Or maybe the answers is those other providers don't have nearly the same amount of sports offerings IN TOTAL that DirecTV has and adding the Pac 12 Network gives them a little more. You suggesting that D* has no basis in fact.
In my mind this is what it comes down to. How much better of a deal can DirecTV demand because of, more than anything else, Sunday Ticket. The biggest blunder I think Larry Scott made was over estimating the fan base on the West. For every fan I've heard say they are switching because of P12N, 10 more might be mildly disappointed they will miss a couple games, but not enough to consider leaving Sunday Ticket.
If this were playing out in Nebraska, that number would be completely reversed (and probably more like 50 to 1 would leave DirecTV in a heart beat to make sure they didn't miss a Husker game). The PAC-12 fan base is just not that passionate. So Scott is asking for Big Ten money and exposure, but doesn't have the fan base to back that up (ironically the football has actually been better in the PAC-12 than Big Ten over the last 10-15 years, but it isn't about how good the product is, but how much do people want to watch it).
It is interesting how differently the BTN played out than the P12N. Initially, the P12N had more distribution than the BTN on opening day. But what the BTN did in the first year after it debuted blows away the P12N. To me this suggests that on paper the P12N seemed like a good deal, as they had a solid base on day one. Reportedly they were (are) asking for same packages as BTN (i.e. Dish 120+, DirecTV Choice), but at a slightly lower rate (per SNL Kagan). But when BTN started, it appeared there was a lot more movement of customers, and that forced those providers to act to add the BTN. So while the BTN proved its value, the P12N hasn't seen that customer movement, and was shown to be overpriced, especially for a provider like DirecTV with Sunday Ticket.
So if DirecTV doesn't see value in the PAC-12 at their asking price, what does/should the PAC-12 do? It seems they are left with 2 choices, cut DirecTV a special you've-got-Sunday-Ticket-and-no-one-else-does price, at the risk of undermining future contracts and alienating existing providers. Or wait out DirecTV in hopes they lose Sunday Ticket exclusivity, and then re-attack. It appears they are doing the latter.