PTP24 is the third and final legitimate PTP that I know of currently that pays in dollars it has a decent CPM and it is pretty easy to pick up the dollars as you can use the sites promotional code through the likes of otohits and hitleap etc, which means you can make $$$ very quickly, I have been a member of this site for a while now and have made a little under $400 from it, it pays into Paypal.
It can be slow to begin with but once you start earning and leave it to it's own devices you will find you can rake in the cashg really quickly :)
