I think that it probably represents how things are in a few select US cities where rental is the norm because there is enough demand to allow for cheap rental and it's just part of the culture.
To me, this is connected to the recent thread about F/H as well. I think part of the reason that that Hy6 never took off is because they never came out of the gate in a BIG way. And part of BIG means you dump a ton of inventory into rental shops, and you begin to circulate the camera on a large scale. The only Hy6 I ever saw in person was in a glass case at Kurland in NYC, for sale. I just think, in today's tough economy, you've got to come out big, or else you just get lost in the middle. And the H has come out big. Look at ForSale ads, and compare the listings for WantedToBuy with ForSale. Check out WTB ads and you see Hasselblad HC lenses. It is a growth area. (But for use on Phase backs; sorry couldn't resist).
The H is in no way a perfect camera, but it's the best of the lot, and it's out there for consumption. And for rental. I don't know many guys who will/can afford to keep a full stock of every H or Sinar or Rollei lens in their bag, so it's very useful to be able to call NY and have a lens Fedexed for a job. Bill it to the job, even if you have to bury it, and you're free of paying for the lens, maintaining the lens, and insuring the lens.
Whether or not Hasselblad pays to get their stuff featured is immaterial. What is true is: Hasselblad H is in the culture. You see them everywhere, and they're EASY to rent.
No one likes to see a camera system go away. That Hy6 looked promising, and it kept MF out in the culture. MF should not go away. But there's somewhat of a critical mass that you must reach, before something can gain mass acceptance, and I don't think that Hy6, or any of its twin brothers, ever even remotely approached that critical mass. And with Sinar's reputation of arrogance, whether true or not, it only added to the Fear Quotient of writing a check that large for that brand, in this current economy. I hope that that Hy6 can come back to life, but if they do, they need to find the rental marketplace, so that people see Hy6 on television, instead of the millions of H bodies out there. I just think it's human nature that people (photographers) want to feel some kind of endorsement like that, even if it's subconscious by seeing it on television, before they write a large check. No one wants to be Customer #1 to wade into uncharted waters.