Asking for information for one purpose and using it for another is amazingly user-hostile and abusive, and it's an almost universal practice for technology companies.
I first noticed phone number abuse with facebook, which asks for a phone number for "security" but then uses it to match you with advertisers.
It's the same scam that sites have been running for years where you have to use an email address as a user login, and that address is instantly added to spam lists.
"Sign in with Apple" is hilariously useless since privacy-violating apps can just require a phone number for "security" or "verification" purposes.
I first noticed phone number abuse with facebook, which asks for a phone number for "security" but then uses it to match you with advertisers.
It's the same scam that sites have been running for years where you have to use an email address as a user login, and that address is instantly added to spam lists.
"Sign in with Apple" is hilariously useless since privacy-violating apps can just require a phone number for "security" or "verification" purposes.