They did that to me too. I got 5 rides at 50% off, and even though I'd rather use my free ride for the longer rides, I decided to stick it to Uber by taking Lyft for the longer rides, and used those 50% off rides to commute to/from work instead. In my experience, Uber is great when it works by itself, but Uber customer service is pure garbage if you ever need to contact them.