Which part of the TOS do you think this would violate?
AFAIK you're not under any obligations to show Adsense ads to all users, or all of the time. I know quite a few people who only show Adsense ads to search engine visitors, for example, or block ads for people arriving with certain referrers.
AFAIK you're not under any obligations to show Adsense ads to all users, or all of the time. I know quite a few people who only show Adsense ads to search engine visitors, for example, or block ads for people arriving with certain referrers.
This seems like a similar move.