Uber bans tipping. It collects the same amount of money regardless of who the passenger is. An Uber driver has no reason to use blunt heuristics (such as skin color) to try to visually identify fares who have more money.
Sounds like Uber is letting its drivers make up their own rules to continue the fiction that its drivers are "independent contractors". If they keep doing that they'll be as unaccountable for customer service as the average taxi dispatcher.
Where i live, we're not used to tipping, is that really a big thing considered by taxi drivers when picking someone? Because we don't have tipping and the racist drivers acts the same.
