Well it’s up to the dev whether to use iap or not. But in the dev uses iap and makes money from an iOS app, Apple should be entitled to a fee, even if some are against it.Ok what are they going to say it’s not fair because developers like Spotify are not using our IAP method so because of that we deserve a cut because we are not forcing them to use that option.
Even if every developer was required to use IAP it wouldn’t make a difference because if they are allowed to put a payment link in there app they will make it cheaper than IAP purchase because they are not required to pay Apple any commission because the transaction is getting made on the internet & not in the app