I own many forums like www.rouletteforum.cc. They get bombarded by scammers selling systems that don’t work. Initially I let them sell to people, in the interests of transparency. But when it becomes clear they’re scamming people, and the victims complain to me, I ban the scammer to protect my members.
The scammers become angry, then attack me. Mostly they just “cut and paste” trash about me from other websites, without any regard for the accuracy of the material.