Hi marcell, great questions.
1) Yes, at least today. We call them Operations Specialists, and they're highly trained in operating autonomous vehicles and customer service.
2) This is a tough one, since it's not apples-to-apples. That said, Waymo is clearly the industry leader in this regard, and we're glad that at least some of their formula is observable from the outside. We've been at this a little less than a year, and today many of our passenger rides are 95+% autonomous. A long way to go, though!
3) We love these communities for a number of reasons:
A) Speed limits in these communities tend to be a little more restricted than everyday public road. The faster you (and others) can go, the more complex it becomes. The roads are also spectacularly well-maintained.
B) Customer acquisition is a non-trivial problem, and with these sorts of partnerships we gain (exclusive) access to 125,000 potential riders. It would be brutal for us to achieve the same in San Francisco, and not necessarily cost effective to retain them.
C) If we wanted to try out concepts that may accelerate the timeframe to remove the Test Driver, a private community is easier to collaborate with.
D) Above all else, there's just a lot of demand for what we offer in these sorts of communities. Self-driving cars will lower the cost of transportation, and for those with vision impairments (or Parkinson’s, Alzheimer’s etc.), it enables such residents to get around with less friction.