Hey Tom-
Do you participate in the forums where you post too? A lot of forum owners resent people who ONLY post in their forum when they want to advertise something. I’ve never had anyone complain about my posting in the spam section as long as I was participating in the rest of the discussions at the forums too.
Honestly, you’ll get more click through’s by putting your URL in your sig line and participating in conversations, because people will want to know who you are. That’s been my experience anyway.