signor_john - 3:41 pm on Jan 31, 2009 (gmt 0)

That's why I want to know what I need to know before using YSM to drive traffic because I suppose that google will be more strict to sites using PPC programs.

Jimmy, you've had plenty of advice in this thread, all of which you've responded to with arguments. Again, why not ask AdSense Support whether it's okay to use YSM or MSN ads to drive traffic to your site? You may or may not like their answer, but at least it should be definitive.