Hi,
I'm in the stage of the first campaigns.
focus on email submit sweepstakes. ....................... (probably some of you can relate to me)
I read that It's important to stick to 1 traffic source.
I've also read that If you can eventually master him, it is an advantage.
The thing is there is no really clear answer.
I thought that we can all benefit if everybody drop his thoughts on each traffic source. ............ (or at latest on some of them)
So here we go..
(Of course that you don't have to write on everyone, 1 or 2 also can be cool)
I'll start:
PopAds - seems great but I have not seen someone with green ROI on the forum yet (yet!).
AdCash - Proven to work However, It's still worth it after the 20% VAT? or It's only in my country?
ZeroPark - seems big but they are not accept new affiliates.
What do you think?
adcash/propeller are good because they're just so big
gunggo seems to be a very underrated platform. their traffic quality is great from what i hear but you need a big initial deposit of 5k
All Vertcials really work...You just need to start with one and make it work! I know at least one person that has made each of the Pop Traffic sources work.
Get started and you will be fine..
you can add wwwpromoter to that list as well
I would recommend you to check out the Wiget Media self-serve as well as you get access to 70-100 million pops per day there from direct publishers mostly. Let me know if you have any questions as well, I'd be more than happy to help.
I believe u can use that, i think. In the uk we use a social security number, same thing in spain?

You guys have already identified the biggest ones. Others to try: eDomz, Selfadvertiser.
Amy
Welcome aboard Bimoca! Sorry for the late response, let me know if you need any further assistance. Feel free to PM me directly in that case. 
Apart from the ones you mentioned above, exoclick also has a lot of pop traffic both on adult (majority) and their "entertainment" channel which is supposed to be non-adult
For adult....traffichaus and doublepimp work best for me. You can get some exclusive fixed deals on traffichaus if you got the $$