i tried register account require phone number, i register with my email, why ask for phone ?
I remember that a phone number wasn't needed, only if you entered certain communities that required a confirmed phone number.
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It's for targeted advertising. Try a better platform.
I guess it’s a good thing my account is old enough that I didn’t have to provide a phone number?
Officially they don't always require a phone number to register an account. Unfortunately the reality is that they may as well require it for all new accounts now, I can't remember the last time I heard of someone registering without one.