I suspect no-one offers tips.I suspect that in service to some customers, some of those customers offer them a tip in appreciation. Apparently, they can't accept any such tip right now.
That sounds like a Genius appointment. Since there's no fee for that service, there will be no opportunity now, or in the future, to add a tip to $0.This is not about seeking a tip for a simple transactional service like selling a phone. But maybe someone spends 30 minutes to teach someone how to solve some problem or how to use some app features, etc.
Again, Genius appointment.Someone comes in with all of their (subjectively priceless) data apparently lost. An Apple representative is able to figure out that its not really lost and helps them recover it. It's not hard to see that panicked customer perhaps wanting to reward the help with more than just a "thank you."
And another Genius appointment.If someone spends some service time at an Apple store teaching me how to do something I can't figure out, it's not like I would naturally NOT be moved to tip for good service either. Is pizza delivery or broken down car help and in-person tech help/services so different that only the former should be OPTIONALLY tip-able? I don't feel that way.