I thought it was against TOS to put Adsense ads on your sites you advertised with pay to surf. However i most paid to surf programs i see sites with adsense ads all the time.
I believe its against the adsense TOS to have people auto-surf your page if it has google ads on it. As they count as non-genuine impressions.
It is assumed that Adsense not allowed auto-clicks, I know about surf programs, but i didnt know if it paid sufficiently
They will be banned as they are found, typically a site can go 6 months violating the TOS before it is caught.
It is also risky, even if Adsense may not know it is Paid to Surf, the actions of those paid to surf and the sudden increase may trigger alarms or a ban for your adsense account, it would be much safer to earn your adsense through organic traffic instead.
It's not against TOS if the ads aren't on the surfed pages. It's just like proxy sites. It's allowed on the sites as long as it's not on the proxified pages.