I'm not completely sure. Your best bet would be to put it in the Advertising section (bottom of the index) or maybe your sig, but you should wait for a mod/admin or more knowledgeable member to come by first to be certain.
You are not allowed to use affiliate links to any sites. If you just want to give a heads up to the forum about a nice site to make money that may be borderline basically all in how you word it. Plus it will be negative on you to start putting up a bunch of ads on how to make money when your a very new member.
Personally I wouldn't advise but let a mod clarify that.
hey and welcome. i think brookfield pretty much answered your question.
although hopefully you will stay and post about computers and not just advertise