Just want to push a bit for a brand new (not yet launched) PTC site that soon, very soon will be launched. There are as you know several ones out there that pays out in Bitcoins. This one will have multiple crypto coins to choose from to get paid in. There will be Bitcoins, Litecoins, Dogecoins etc... and many more.
There will be a referral system in it too, and all is done in a very understandable and easy to use interface. I would say, that this one is the one to go for, when it's launched!
As soon as it's launched (I am in pre-launch/working with the team launching it), I will post here in the thread again, so you all can join in!