Scammy company.

I've never had problems with shells collection, but that's the only positive thing I can say about this platform. Questionnaires are few and far in between, and not very "lucrative". Even worse, the "gifts" are overpriced, and gift-cards are constantly canceled: for example, when I signed up, they had 10-20 EUR ones, but they kept increasing the value (and therefore the amount of shells necessary). I think they do it on purpose, because the changes are just too well timed with big shell rewards to be casual. I'll stick with them to at least try and get my time's worth, but I strongly recommend to anyone NOT to sign up with them: they're horrible.