I'm not sure about the people saying it's a scam-I've cashed out a few times and I'm up to another $50 or so I'm about to cash out. You're not going to get rich off of taking surveys and clicking through emails-duh! I'm only giving it 4 instead of 5 stars because there's no link to the survey page that lists surveys with their payouts that you sometimes get to if you don't qualify for a survey. That page is a gold mine, which is probably why there's no link from it in the Surveys section of their site.
I think the gold standard for clickthru emails used to be mypoints but I've made more money off of this lately. Again, it's not going to make you rich, but if you're like me and like getting a little extra money for little effort this is a good one. This site is definitely NOT a scam.