which is better? i know that google doesn't do CPM. and if you were to do CPM, where would you sign up?
Google Adsense do CPM ads... For better CPM valueclick is best... they dont accept all publishers....
if your site does enough volume you will get CPM advertising by google. I personally prefer CPM over CPC though CPC can be very nice. Pierce
i also prefer CPM,as it less annoying for your website users. The thing is that in order to join a banner ad network you need to be able to drive around 200K pages views/month.
it depends on your site. if you are doing a normal site - then PPC is nice. But if you are running a site that will likely have a very low click thru rate - then CPM is great cause you are getting paid just for it being htere. Adsense gives you a eCPM which is an estimate based on 1000 page views. SO look at that - and see if you can get a benner CPM rate elsewhere.
Imho it depends from website type. Another kind of people click most ofter, another less often fo this second, better is CPM...