Is adsense OK on a proxy? what about the proxified page? Should I take them off or does google allow this?
Yeah, proxys has always been a grey area. Never place them on proxified pages, and make sure if displaying them on the index page that you have a paragraph of content.
That will be due to no content. I have had it confirmed that they are fine as long as you have a paragraph or two of good content. As posted above, describing what a proxy does and also a disclaimer is a good way to add useful content, enabling you to show google ads.
You know you're still violating TOS right? No adsense on proxified pages. (After you type in google.com into the address bar, there there is the menu @ the top, that is the proxified page) You can put a leaderboard underneath the link unit.
What about putting google referral units on proxified pages? They aren't contextual...so should be no problem.
I wouldn't put any adsense on proxies right now, especially with all the issues of Google banning people & sending out emails about invalid clicks due to some sort of botnet that is attacking proxies, check out the other threads here on DP