Very good question! From my previous experiences, i think your Adsense account will be 100% safe. The reason i say that is because almost 2 years ago (wow! time flies) I used a very popular high PR blog network which got a lot of attention from Google and Matt Cutts just like Sape is getting today. Once Google managed to shut down this network i was using, my site got penalised as you would expect. But guess what? I still received my cheque for adsense that same month! So my conclusion is that your account should be safe, after all you are still bringing in 100% legitimate clicks, which is what they want.
But JUST in case your account gets banned (highly unlikely), they cant prove that you used SAPE yourself, you could just spit out a lie and tell them that someone else pointed 'dirty' Sape links to your site deliberately to get you penalized