See, I tend to disagree because that bullet point specifically states that if you regularly advertise contracts for rent on a "dedicated website" or use a "third-party service provider" on
any other media or platform now known or hereafter devised", you run afoul of the rules.
That very clearly states that simply listing a confirmed reservation on ANY website (or apparently anywhere else for that matter), even if it's just an electronic want ad board, your local community forum, a Facebook page, a Reddit page, whatever, you're in violation of the rules. Obviously, it's still a matter of how much or how often. The broker doesn't even need to act as an intermediary. They are providing a service (a webpage) where owners seeking to rent out confirmed reservations can list (advertise) them.
Now, obviously,
DVC isn't going to be trolling my local community message board looking for DVC contracts for rent, but a site dedicated to listing points and reservations for rent with "DVC" in its name? That's some obvious and low hanging fruit. Again, Disney has no control over the broker (unless they are an owner as well), but they DO have control over the owner advertising their points for rent on that website. I don't think the "intermediary" part even comes into play (although you just have to know that some lawyer somewhere explicitly told them to use that term for some very obvious reasons). They're soliciting DVC owners to advertise their contracts that they want to rent on their website (providing a service), and advertising is specifically what that bullet point addresses.
The only ambiguity is, again, the use of the term "regular".