They own a lot. They have 20 property holding companies, and only a few are obviously owned by Disney, not sure if that also carries to the businesses on all of those properties. It is possible someone could be on Disney owned property, and thus caught under the Disney+ agreement, without knowing it.
I also suspect it won’t be upheld, with Disney’s ever growing footprint, some of these mega companies become harder and harder to ignore.
https://en.m.wikipedia.org/wiki/List_of_assets_owned_by_the_...