I don’t know how much money organisations/people fork over for the privilege, but my understanding is that you get a bit of a “old boys’ club” of rich people associated with any kind of happening where lots of money is involved.
And F1 certainly qualifies for that. There are several investment and equity firms directly involved with F1 through teams, not to mention the one that owns the F1 rights. Then there are all the large companies sponsoring the various teams. Between them, for example pretty much all the oil companies are represented, as well as big Middle Eastern money. That makes F1 a decent place to meet people and make contacts or even outright deals.
Anyway, I’m nowhere near being involved in any of that shit. Money bores me (although I could do with a bit more of it really ;) ), but that’s what I imagine that whole setup is about.