The thing is, Apple only 'force' you to add their option if you have an app on the store and offer another form of public federated identity provider. If you do

The thing is, Apple only 'force' you to add their option if you have an app on the store and offer another form of public federated identity provider. If you don't want to offer Apple as an option, then don't offer anyone else. Look at the context of why they have enforced it. Privacy is hard. The concern is that that the majority identity providers/brokers in use are Facebook and Google. I'll happy listen to the 'competition' argument as it does have a little merit. However, when weighed up against the notion that these two are the only real choice for a significant volume of apps, it is extremely worrisome from a privacy point of view. Neither have a reason to respect end users, or you as a developers privacy because that's how they make money.