https://itunes.apple.com/US/app/id650276551

Download this workout app and open it. Go through the steps of the workout, and at the end you should see an offer from Bengay to get a $2 Amazon credit. This seems to show up for everyone right now but probably won’t last long.

Update: Make sure you let the app go through the steps, it doesn't seem to give you the reward if you skip.