There are a few legitimate ones out there, but I've never made more than around $100 per month (on a good month) with them. Probably the best one and the one that has been around over 7 years is
www.mysurvey,.com. They will also send you free products in the mail to test. It is pretty easy to get to the $10 cashout. They pay by checks and my check almost always comes in within a few days of requesting it.