There's a point to many things and features, that isn't to say they are needed.
Paying to be unbanned shouldn't be a thing anyway, but I don't know the situation with that. It's also not hard to go to someone's profile and look at their recent posts, most of the time you'll see something related to a 'scam' or 'dispute'. Anyhow, anyone who scams shouldn't be allowed back personally.
Just my opinion, anyhow. If something like this is added I wouldn't mind, but don't get your hopes up as there are things from months ago which are still to be changed or added.