Three strikes is a "get your shit together" policy.

Seventeen is a "yeah sure it's not allowed wink wink" policy. Especially when they'll just go make another account afterwards.

Nonsense. There are lots of things that you need more than three strikes for, especially on a platform that you expect to use for decades.

I'm not here to say that Facebook's enforcement behavior is optimal, and I don't know that a "17 strike policy" is a full description of their enforcement behavior. But there are plenty of behaviors that you want to discourage but not go nuclear about.