I really liked it when people downvoted me when I wrote that Google pushing for 2FA phone numbers is doing it to get your phone number. (they don't use it for ads but lately I don't trust them, also 6mo ago I removed my FB)

In the end I gave Goog even 2 of my numbers because I am scared as hell to lose access to my account. I got my Gmail account when it was in 'innvite only' so it is my main account for long time. Have to move out of it soon.