As to why those 2 didn't jump, they weren't willing to leave the ACC behind. I can't speak for UVA, but at UNC they
would've lost much more in AD contributions than the new TV deal (then) would've brought in because as much as TV drives the media deal situation, hoops is where the deeeeep pockets are and what nets the largest share of booster $ at UNC (and Wake, Dook, etc).