uber would have no hope in the first place being a foreign, non-chinese company that relies on internet access to hosts not wholly controlled and hosted in china
Using Uber here in Suzhou, I'm pretty sure their China servers are completely within China. There is no "bump" from transversing the GFW and starting such a service in China without having the servers inside would be crazy. There is no reason they couldn't just completely partition their service.
Not sure about you but I've personally started and run a foreign, non-chinese company that relies on internet access to hosts not wholly controlled and hosted in china without insurmountable problem.