if the site does not allow you to advertise then why are you trying to be a weasel?.... If you have really valuable things to say put them on your website... then traffic will come to you? Build your website - unless you enjoy posting on forums.
You are experimenting. That is good. Run LOTS of ads. LOTS! Learn what gets clicked (will help your quality score). Learn what coverts (will help profits). Then turn off ads that do not perform. Its easy.