The rev share program has been suspended at the moment read http://forums.digitalpoint.com/showthread.php?t=1412285 for more info.
Don't worry. I didn't make a penny from DP in last 1 year. It is better now, at least i wont expect any more.
It's easy. Sign up to Adwords. Nominate the website and bid on the ads. if you bid is higher than anyone else your ads will show. Or was it just that you want to publish other people's ads using your adsense account... well you can't do that anymore.
You are late but adsense revenue sharing does not bring you good earning Better build your own website and earn