Surveys.com is an Online Research Community operated by GfK. GfK is a top-ten market research company, uniting some of the most renowned US and European research firms into a single global organization.
In addition to cash rewards, most surveys offer rewards that range from 375 to 750 points. You also get 25 points for any survey you don't qualify for.
The reward points can be exchanged anytime by selecting from a huge variety of prizes. They can be as simple as a single MP3 digital music track or $25 dinning certificate, all the way up to major rewards like a Panasonic 12 Amp Canister Vacuum with HEPA or a Maytag Ice2O Series 27 cu. ft. French Door Refrigerator.
Obviously, the more time and effort you put into Surveys.com, the more you can get out of it.