[nihonde]

That’s not how antitrust law works. It’s not a test of whether a company exerts too much control over its own customers. It’s a test of whether customers have some alternatives and a real opportunity to vote with their dollars.

[sturgill]

Apple has argued that developers are its customers (in the Pepper lawsuit). What options do developers have? Ignore the iOS market (those most likely to pay money)? There isn't a choice here: you let Apple have 1/3 of all of your revenue and you implement Apple Sign In. Because... competition?...

[Mindwipe]

That's how American anti-trust law works.

It's not entirely how European anti-trust law works.

[EGreg]

Yep, that’s what meant when I said that the definition was too narrow

[nihonde]

Antitrust is among the most mature areas of law, in terms of how these concepts have been thoughtfully wrangled over. I definitely encourage you to dig deep on how market scope is determined, if that’s interesting to you. There are many ways to manipulate a market but very few rise to the level of requiring state or regional government intervention.