As much as i don’t really like this there would have been a loophole where you use fake temporary family members to continue cheating.
Back in the day some games also banned your homes external ip address which would have a similar effect.
Imagine moving to a new place and being banned because the last person who lived there cheated in the specific game you play lol.
I tried to sign up for a Facebook account (hate it, but market place seemed like my only option for something I was after) and had my account automatically banned on creation. Twice. They demanded photos of my face, which I begrudgingly gave them, and still never approved my account.
I signed up for a new one with the exact same information from my mobile data plan instead and it worked fine, and I never got banned