So I run a agency and work with people on Kindle, but basically in the past I had my own account, I decided to set up two accounts one with my friend and one with my girlfriend they were publishing their books, but I ran PPC campaigns with them, my card was attached on their account which live for a while but recently both accounts got immeditaly banned. Only connection was IP address were the same as mine and bank card to pay PPC accounts with my Name which my old account was banned in the past 2 years ago... I don't see how anything is violated as I didn't violate any rules... These are there accounts. KDP won't explain anything.