There are many platforms or third party Dapps one can get banned on. We have steemcleaners, Utopian, steemstem just to mention a few. Most of these platforms keep their blacklist and you have to contact them to know if you are on their blacklist.
However, a website was developed and it draws blacklist accounts from all these platforms then compile them.
You can check
Remove your name and slot in any user name to know if that user is on any Dapp blacklist.
Cheers, you have a clean record.