I am not in the US, but I take part in Samplicious surveys. Well, I say 'take part' but as the first person rightly pointed out, I have lost count of how many times I have answered loads and loads of questions only to be screened out at the last minute, with them saying either: This survey is now closed or You have not qualified for this survey! So it took them nearly to the end of the survey to find this out? It's a disgrace and I feel that Samplicious should be investigated. They show up decent survey sites, ones you can rely on to do the right thing. Grrr...