Not sure what the problem is...
smartz is a grown man who can make his own decisions. He chose to post exclusively at thefellasforum. If doc made it worth his while, then so be it. That makes him a bad person, for trying to make his site more profitable? It's called business, and he didn't do anything unethical or anything of that nature.
It's also not like he put a gun to smartz' head and told him he's not allowed to post at the Rx anymore.