Not quite sure why you keep asking what the "unwritten rules" are even after 00tec took the time to link and quote the rules for you..

I'm guessing if you didnt get a response from Marlin then its likely safe to say you dont have permission to post up commercial ads promoting your business. Had you taken the time innitially to read the rules and asked FIRST you likely would have been grated permission.

Thanks for your understanding and cooperation.