I'm in a high rise in Boston, similar situation but with Comcast. I also spoke with Webpass a few days ago, they say that my building has a revenue sharing exclusive agreement with Comcast and that Webass does not participate in revenue sharing agreements. This feels like it should be illegal but my sister, an attorney, did not see anything obviously wrong under current law.
in a MDU, the owner owns the common spaces. that includes risers and inside wiring. they're free to sell, lease, or restrict the rights to whomever they please.
just like wifi ratings for hotels have become a "thing", so must exclusivity agreements and broadband providers when it comes to apartment/housing hunting.
it would be extremely difficult bordering on impossible, in my opinion, for a law in the US to prohibit property owner rights in a fashion that prevents these kind of agreements. only a "market" solution would work here. and of course, that's very difficult on its own.
I'd like to see that change.