I am also very interested if anyone had any success with this. I highly doubt it thought. Because many just click to get the money for the click. Nobody is really looking to buy anything.
90% of that traffic is generated by bots. 9% generated by people not even looking at the site and 1% actually looking at the site but completly un-targetted traffic....You will be lucky if you get a sale in a million click.
I was running Clickbank advertising in too many ways for two years, including joining to a site that provided an Adsense-like formatted links and running a script to setup a full Clickbank search engine. Results: tons of traffic and $0 earnings from Clickbank for two years of wasted time, similar to the wasted time I spent at CJ and Linkshare.
PTC is not good for anything legit. The only way I could imagine you can profit off it is by the use of blackhat methods...