http://www.rttnews.com/story.aspx?Id=2628317 Uber is setting up a loyalty rewards program which is ongoing, and encourages anyone who hacks them to come forward and receive compensation. This is a smart approach by them in my opinion. When Uber is hacked, maybe their customers data won't end up all over the deep web like every other hacked companies does!
It seems that drivers "hacked" their algorithms: https://www.schneier.com/blog/archives/2017/08/uber_drivers_ha.html