earn Reward points. Notably, this form of fake currency can be easily exchanged for another: Microsoft Points.
The program allows you to trade in Reward points for Microsoft Points in 100-point denominations -- though it's unclear how quickly one can accumulate these points. We do know that installing the Bing toolbar earns you 250 points from the get-go, of which 200 can immediately be exchanged for $2.50 worth of Xbox bucks. So what's the catch? There doesn't appear to be one.