also do crowdflower. check it frequently there are always 25 and 30 point tasks popping up. If you want to make thousands of points at once you usually have to be willing to spend a couple bucks on a trial and remember to cancel it before they charge you a lot. trial pay gsn offers will get you like 2500 points and you only have to spend a dollar and it's not a recurring service, just a one time charge.