Dude wants to sell his program, fine. No issues there outside of potential EULA problems.

Dude wants to hock his wares, generally ignore questions posed, disparage alternatives, and use an alternate forums account to act as the inside man in the crowd, he starts to get annoying and shady.

If Evilseed/Mousecloner wanted to be up front and honest about his program, fine. No one rides Keyclone for providing a program and charging for it when there are free alternatives out there. Then again, Keyclone doesn't hide behind alt accounts or post adverts about how great his product is, and is a generally all around helpful guy.