Here's another survey site to add to your collection: eSurveySeeker. This place claims to have high paying surveys available as well as other opportunities that you can use to earn a little extra cash on the side. They're pretty new and not very heavily reviewed yet, so here's what I could dig up about them.
How to earn with eSurveySeeker
eSurveySeeker has several different ways to earn money including paid surveys, focus groups, discussion groups and mystery shopping. The payouts for surveys appear to be $1 to $25 with much higher payouts from the other opportunities, if you're able to get approved for them.
How eSurveySeeker pays
According to the FAQs, there is no payout threshold to worry about with eSurveySeeker. Instead, you're paid directly by the companies that request the surveys. They may pay by check or PayPal at their own discretion. For some people this may be a good thing or a bad thing. You don't have to hit a certain amount to be able to get access to your funds, but on the other hand each company may take their sweet time paying you for your effort and eSurveySeeker has no control over that.
Who can sign up?
eSurveySeeker is open to individuals in the US who are at least 18 years of age.
Availability of earning opportunities
Since the surveys and opportunities pay so well, they're naturally somewhat rare. The FAQs state that you can expect your first survey within the first week or two of your membership and may get 2-4 surveys per month. While this isn't a ton, it doesn't mean you shouldn't sign up. The idea behind using survey sites as a way of making extra cash is signing up for several different sites and do surveys whenever you're able so you create a steady income flow.
Since eSurveySeeker isn't a well established survey site, there's not a lot of information out there about them and how reliable they may be. The fact that the companies requesting survey participants are in charge of handling payments can be viewed as a good thing and a bad thing so this is entirely up to you and what you're comfortable with. I believe it's worth giving them a shot and it never hurts to add another survey site to your collection!