Dish is on a tight timeline to get their spectrum (quantity) of wireless service to the market. The quickest way is on someone else's equipment, then build your own 5g service on your own time or not at all.
If you can partner with someone who has brand familiarity in the wireless world it is easier to sell your service (tv package). ATT/Directv sell TV/internet together but this would be a cell service streaming tv package. This isn't traditional home internet we're talking about..if it is then i completely misunderstand it.
Again, obtaining ESPN and the rights to stream it when you hold the ability to market it is amazing. If the only way to stream ESPN is to say be a T mobile customer (who would be partnered with Ergen) that would probably generate huge revenue.
ESPN needing to reduce costs to make the sale is what Concep alluded to.
So the question, is Gruden the byproduct or the prize? If any of this is true.