I’ve had bad experiences with iPoll. I’ll answer the “screening” questions and am told I qualify to take the survey, then once the survey is around 90% complete, I’m told the survey is “closed”. My guess is this is how they’re getting their data without having to pay participants. I’ve also gotten “invalid website” in the middle of some of their surveys as well, of course, after answering 15 minutes of questions.
It’s easy to earn cash for surveys. How much you get paid completely depends on how many paid surveys you attempt and complete. Each online survey has a different payout, with some offering as much as $50. Most will pay less, but also take less time. Expect to earn about 40 to 200 SB points per survey (100 SB = $1), with occasional opportunities with much higher earning potential.