It also promotes your tweets. So now you can have all your tweets at the top, without people immediately seeing that you are a grifter who paid for it. This isn't going to be abused in a multitude of ways at all.
It’s still pretty obvious. If there’s a random bad take in the middle of a sea of blue check bad takes, you know instantly that person is hiding their check. Otherwise, they wouldn’t get algorithmically pushed up with the other checks.