But they’re essentially shaking a digital tip jar while in the parks, while displaying Disney’s copyrighted and TM’ed works.Could - but they won't. They want the amplication of 'hey, we're having fun in the parks!' message.. same reason they want their stuff trending in general on social media.
But that's not the same as people who come up with product offers or sell services linked to or in the parks.
This is nothing new and has been the status quo for a decade plus. It's just a matter of how much enforcement ebbs and flows.
You also can't be soliciting using Disney's TMs