Thanks for your answers, Folks! Most of the opinions support the fact that Uber can't deactivate us because of a low acceptance rate, primarily due to the changed policy driven by the class action.
What is still concerning to me, in my case Uber has been evasive to disclose any policy regarding the matter, while my inquiry remains open. I reiterated to them my interest in reviewing their standard operating procedure. They keep sending me their meaningless copy-paste answers ("we are still a young company working on improving notifications and apologize for any inconvenience the time-out might cause, etc."). Then they intimidate me that my account can be deactivated because of a low acceptance rate, followed by a survey on whether I am satisfied interacting with their partner support specialist, and whether the issue has been resolved. No, I am not satisfied, and the issue hasn't been resolved!
It is quite remarkable to see this ambitious, apparently well-funded, company being so unprofessional, misleading and almost hostile to its partners, while siphoning a lot of money on the prime time TV ads to attract new drivers. What a misaligned strategy for the business expansion...
I believe this interaction with Uber should be passed to the class action lawyers, as additional food for thought in the process.
If someone has policies, emails, etc. from Uber explaining their standard procedure regarding the acceptance rates (and cancellations perhaps), in addition to what Roger JS and Uber Strike shared, please share with us as well.
PS. Uber Strike, I like your motto "UBER HAS ZERO CARS, UNLESS THEY HAVE YOURS!!!" Very relevant to this thread.