The Platform Antitrust Story

Zusammenfassung

Between 2020 and 2024, four of the largest antitrust cases in the history of technology proceeded simultaneously: the Department of Justice’s case against Google’s search advertising monopoly, the FTC’s case against Facebook/Meta’s acquisition strategy, the DOJ’s case against Apple’s App Store practices, and Epic Games’ private lawsuit against Apple. After decades of regulatory inaction, governments in the US and EU began applying antitrust law to digital platforms — reaching different conclusions about what constituted monopoly, what remedies were appropriate, and whether existing antitrust frameworks were adequate for platform markets. The outcomes were mixed, contested, and shaped a legal framework for platform regulation that remained contested as of 2025.

The Platform Monopoly Thesis

Digital platforms exhibit network effects: their value to each user increases as more users join. Facebook’s value is the people on it; Google’s search value is partly its scale of query data; Amazon’s marketplace value is the breadth of sellers and products. Network effects create natural concentration: markets with strong network effects tend toward monopoly or duopoly because users prefer the platform with the most users.

Traditional antitrust analysis focused on price: does the company use market power to charge consumers above-competitive prices? Many digital platforms offer their core services for free (Google Search, Facebook, TikTok). Users pay with data and attention rather than money. This created a significant analytical challenge for antitrust law developed primarily in the era of physical goods monopolies.

Lina Khan, then a Yale Law student, published “Amazon’s Antitrust Paradox” in the Yale Law Journal in 2017. The paper argued that Chicago School antitrust economics — which focused narrowly on consumer prices and short-run consumer welfare — was inadequate for platform markets where monopoly power manifested in the treatment of business customers (third-party sellers on Amazon, developers on App Store) rather than in end-consumer prices. Khan was appointed Chair of the Federal Trade Commission by President Biden in 2021.

The European Union had been moving faster than the US on platform antitrust, issuing billion-dollar fines against Google (€2.42 billion for shopping comparison search in 2017; €4.34 billion for Android in 2018; €1.49 billion for advertising in 2019) and developing the Digital Markets Act (DMA), effective March 2024, which designated large platforms as “gatekeepers” subject to structural behavioral obligations.

DOJ v. Google: Search and the Default Agreement

The Department of Justice filed its antitrust case against Google in October 2020. The core allegation: Google maintained its search monopoly (approximately 90% of US search market share) through exclusive default agreements with device manufacturers, wireless carriers, and browser makers — paying Apple approximately $15–20 billion annually to remain the default search engine on Safari, and making Google the default on all Android devices.

The government’s theory was that defaults matter enormously because most users never change them. Google’s default position gave it an insurmountable data advantage: more searches produced more data, which improved search quality, which made Google more attractive as a default, which produced more data. Competitors could not enter the market because they could not acquire the scale necessary to compete at Google’s level of search quality, and they could not acquire that scale because Google paid to prevent them from accessing the default distribution.

Judge Amit Mehta found in August 2024 that Google had violated the Sherman Act by maintaining a monopoly in general search and text advertising. The ruling accepted the government’s theory that the Apple default agreement and Android exclusivity were anticompetitive. Google was found to hold an illegal monopoly.

The remedy phase was scheduled for 2024–2025. The DOJ proposed remedies including forcing Google to end the Apple agreement, prohibiting exclusive default arrangements, and potentially requiring Google to share its search index data with competitors. Google argued that its search market share reflected genuine superiority rather than anticompetitive conduct. The remedy phase remained unresolved as of mid-2025.

The Apple Default Payment

The annual payment Google makes to Apple to remain the default search engine on Safari is among the most closely guarded figures in tech business. Based on trial testimony, the amount was approximately $15–20 billion annually by the early 2020s. This payment represented a substantial fraction of Apple’s annual profit. The relationship created an unusual interdependency: Apple was simultaneously Google’s largest distribution partner and, as a potential entrant to search through Siri, a potential competitor. The scale of the payment also illustrated how valuable search defaults were — Google paid that sum because the expected advertising revenue from being the default exceeded the payment by a large margin.

FTC v. Meta: The Acquisition Strategy

The FTC filed its antitrust complaint against Facebook/Meta in December 2020, arguing that Facebook had maintained its social networking monopoly through a strategy of acquiring actual and potential competitors — most significantly Instagram (2012, $1 billion) and WhatsApp (2014, $19 billion).

The government’s theory: Facebook’s founder Mark Zuckerberg recognized in 2012 that Instagram was a competitive threat and acquired it to neutralize that threat rather than compete with it. Internal emails produced in discovery showed Zuckerberg explicitly discussing Instagram’s competitive threat before the acquisition and framing the acquisition as a strategy for “neutralizing a potential competitor.”

The FTC case faced a significant legal challenge: both the Instagram and WhatsApp acquisitions had been reviewed and cleared by antitrust regulators at the time they occurred. Arguing that they were anticompetitive required convincing the court that the original clearance decisions were wrong — a high bar.

The FTC’s case was dismissed in June 2021 (the court found the complaint insufficient) and refiled with additional factual allegations. The refiled case proceeded through 2024. The outcome remained uncertain: the legal theory that acquisitions of startups to neutralize competitive threats constituted anticompetitive monopolization had not been definitively tested in court, and the remedy — potentially requiring Facebook to divest Instagram and/or WhatsApp — would be one of the most significant corporate breakups in American history.

Epic Games v. Apple: The App Store Fight

Epic Games, developer of Fortnite, filed suit against Apple in August 2020, directly challenging the App Store’s 30% commission and its rule that all in-app purchases on iOS must go through Apple’s payment system. Epic had deliberately violated App Store terms by adding its own payment system to Fortnite, triggering Apple’s removal of the app — an action Epic had anticipated and used as the basis for the lawsuit.

The legal theory: Apple’s control of iOS app distribution (the only way to distribute non-web apps on iPhone, since Apple prohibits alternative app stores) combined with its mandatory payment processing constituted illegal tying under antitrust law.

Judge Yvonne Gonzalez Rogers ruled in September 2021 that Apple was not a monopolist under existing antitrust law (defining the market broadly as digital gaming, in which Apple had under 55% share) but that Apple’s anti-steering provisions — which prohibited developers from telling users about lower prices available elsewhere — violated California’s unfair competition law. Apple was ordered to allow developers to link to external payment systems.

The ruling was appealed by both parties. The Supreme Court declined to hear the case in January 2024. Apple implemented the external linking requirement while adding conditions that Epic and other developers found commercially unattractive.

The Epic case’s most significant impact may have been indirect: it produced extensive internal Apple communications about App Store economics and decision-making that were used in subsequent regulatory proceedings worldwide.

The EU Digital Markets Act

The EU Digital Markets Act (DMA), passed in 2022 and effective March 2024, took a structural regulatory approach rather than case-by-case antitrust enforcement. The DMA designated platforms meeting certain size thresholds as “gatekeepers” — companies controlling core platform services through which business users must pass to access consumers.

Designated gatekeepers as of 2024: Google (Search, Play Store, Maps, Shopping, YouTube), Apple (iOS, App Store, Safari), Meta (Facebook, Instagram, WhatsApp), Amazon (Amazon Marketplace), Microsoft (Windows, LinkedIn, Teams), TikTok.

DMA obligations on gatekeepers included:

Allow third-party app stores and sideloading (install apps from outside official stores)
Allow third-party payment systems in app stores
Allow business users to promote offers on other platforms (anti-steering prohibition reversed)
Interoperability requirements for messaging services
Data portability (users can export their data)
Prohibition on self-preferencing (Google cannot rank its own products above equal competitors in search)

Apple’s DMA compliance — allowing third-party app stores in the EU, modifying App Store commission structures for EU developers — was described by Epic and other critics as “malicious compliance”: technically compliant with the letter of the law while structured to minimize the economic impact on Apple.

The DMA created a two-tier regulatory environment: EU users had access to features and alternatives that US users did not. Whether this asymmetry would drive US regulatory convergence or produce a permanently fragmented global platform market remained an open question as of 2025.