Again I ask... Do you tip your bus driver? How about your parking lot tram operator? Monorail staff? Ferry captain?The drivers are saying they accept tips. I don't know where you are getting your information. When they started the trial period they were doing it for free, so maybe that's where the bloggers got this no tip thing from. Any paid valet type position you tip. Unless it's Bob Iger driving, they will gladly take your tip.
I'm guessing not.
I do tip the Magical Express driver, but that's more for the load/unload of the bus that the driving.