You should not display ads on register/login/thank you pages.. No!! You can not display ads from YPN on the same page on the same time, however you can use both on the same site or you display non-contextual ads (such as chitika/casalemedia/adbright). Adsense revenue Share is common thing now, and widely accepted, as long as you are not violating TOS by any other means, its okay to allow your users to use their PUB ID to display ads on your site I am not sure about this one, but you shouldnt do that IMHO.
1) http://sheep.allroundnews.co.uk] (as I said, the site/game is unlaunched hence why I haven't bought the domain name yet). 2) So I can use other advertising networks, as long as tehy're not context base? Like "you've got one new message *flashes madly*" (not that I ever would of course)?
Could I just put some <s>random</s> relevent stuff about what a user can do once they're logged in? That would be content, ne?
My site over 15000 Impression(About 80%) is from the protected page. and require for login. but the ads still okay to me ??? You shouldn't place adsense on login page. If the member want to login , will they click the ads and navigate away from your site (unless pressing ctrl/shift)?
Its probably because its only getting information from the TITLE and other HEAD tags and stuff from the Login Page, so you'll probably get slightly relavent data but not as much as you would if it were unprotected.