I paid the stupid $5 up front, and my ad was in 'waiting approval' status for 2 days. then it got disapproved, I guess because it was about google adwords. stupid. Let me advertise what I want.
I found a $150 credit for adcenter that I'm using. Even though I'm running ads for free I still don't like the program.
I have been doing it for the last 3 months and found that if the page refered is not having the particular keywords or similar keywords, adcenter gonna disapprove it.
Been there tried that... Adcenter can be very profitable but too many compare it to google... Google is a good place to start because it is very user-friendly. However, I like some of the tools in Adcenter much better. I just wish that Adcenter and Google could merge and work as simple as Google Adwords....yeahright!
MSN can work but i would start with google then use those terms in MSN. I would not start you PPC with MSN