Let me give you my best advice -- Amazon Mturk. I didn't like it at first but I think it's because I didn't understand it. It takes some time to figure out your niche, but once you do, it presents a lot of possibilities. I'd stay away from PTCs. They just are not worth the time or effort. The market for that kind of thing has gone way down.
I am not sure, but I think MTurk is international. I do a lot of UK surveys and I've seen things in French and Spanish, and I know they do Canada, so I would go and check it out.
I have never done surveys or such thing except for Pinecone which is an extremely reputable company and it pays £3 per survey but as far as I know you can only join by invitation.