[frittata]

This sounds like it could become dangerous for guests. e.g. a host doesn't want to host you, but they also don't want to lose $1,000. So you show up at their house and they convince you that it's in your best interest to cancel the reservation on your end... or else.

I've had >1 Uber driver call me and ask me to cancel the request on my end because he realized he couldn't get to me for X reason, and he didn't want the cancellation to negatively impact his driver account.

[whimsicalism]

Yeah Uber drivers wanting to cancel but not can drive a lot of shitty behavior on their behalf, like intentionally driving in the wrong direction.

I've found this kind of behavior is much more common abroad than in the US.