It's not about trust. Uber is just realizing they don't really have any moats. All the gravy they collected from riding the gravy-regulation-skirting train was

It's not about trust. Uber is just realizing they don't really have any moats. All the gravy they collected from riding the gravy-regulation-skirting train was wasted on trying to build competitive advantages, developing self-driving and rewards programs like these to make it more attractive to customers compared to competitors. They've been selling $2 for the price of $1 and now that the party is beginning to die down, they're doing what any large faceless corp is doing - reducing the quality of the services they offer so they can extend their own runway.