FitStudio (ShopYourWay with Sears/Kmart) and PACT coming up, but I thought it was past time to talk a little about Earndit ... as it was one of the first ones I looked into. I actually forget about Earndit most of the time. It's one I signed up for, but don't check in on often.
Earndit connects to several different types of trackers. I just synced my Fitbit and collect points from my steps. There are challenges, and points to be gained from referring people too.
Earndit is one of the reward sites that does allow international users. There area lot of "rewards" ... but they are just discounts in disguise. I have yet to see anything that actually appeals to me. They also have several sweepstakes you can use your points to enter, but that seems like a reach, I'm not really a gambling gal.