Wirelessly posted (Mozilla/4.0 (compatible; MSIE 6.0; Windows 98; PalmSource/hspr-H102; Blazer/4.0) 16;320x320)
As someone that does request and often needs an ADA room, it's still my responsibility to book early enough to actually get this room. It's like handicapped spaces: I can't be mad if there are no more spaces when I get to the mall.
Now, with that said, I haven't found the rates EXCEEDINGLY cheaper than standard rooms so the cost/benefit should normally indicate this room will be at the same rate.
I can only assume that a property with, for example, a dozen rooms but they have not booked any of them to date and they just want revenue from these extra rooms.