Doesn't it require an active developer subscription?
> That's no more of an issue than if you are using any other IDP
Google and FB are pretty lenient about who is allowed to use their sign in and i haven't heard of any horror stories. Comparatively apple is very aggressive in removing apps.
> iOS users are a small user base?
It's like 12-25% of users which is not a lot and it is very highly overlapping with people having FB/google accounts already, so it definitely seems like an "optional" sign in option.
-United States 54%
-United Kingdom 49%
- Japan 70%
Even if you take into consideration poorer countries, the more affluent population still has iOS devices.