I test products about twice a month by qualifying through surveys. That works for me because I always get stuff my family uses anyway, and I've never been asked to return anything. I've heard horror stories about companies wanting empty bottles back and stuff like that. But I have good luck testing the stuff they ask me to, and while I prefer cash for surveys, I'll take free stuff too. Anyway, I stumbled into that, and I guess I'm in a good (family) demographic, but I'd be wary of any test site you can't find any info on.