I joined Crowdtap a few days ago and it seems great so far. You start out simple by just answering quick questions or "quick hits", and you get a certain amount of points for answering them. Your ranking goes up the more points that you get, and the higher your ranking, the more opportunities you get. You can get invited to join in discussions, where you get points for answering a discussion question and then joining in the discussion with other users. You can also get opportunities to sample new products or websites and then you can convert your points into cash once your points are worth a minimum of $10.00. Five percent of your earnings go to a charity of your choosing, so you can earn a little bit while helping a good cause. So far, it's really simple to do and kind of fun. I've been trying to do it as much as possible because I like to see my rank go up and find out what new opportunities I may get.
Have any of you worked with Crowdtap? How has it been for you?