I just don't trust these sites. I don't mind answering a survey, but there's times where it gets really ridiculous. And there's others where you could spend a half hour answering preliminary questions only to find out you don't qualify for the rest of the survey and henceforth, get absolutely nothing out of it.
The only AP offer that I really liked and felt was a good deal was a Discover credit card offer, which I still use to this day. But the others asking for email and credit card info and look like shady, non-descript sites, yeah, I just don't trust those with a ten foot pole. AP, after all, is still just a virtual currency. It's not worth risking your machine or personal information being sabotaged by these sites.