According to https://www.google.com/amp/s/seekingalpha.com/amp/news/3407060-dish-t-fire-new-salvos-hbo-blackout AT&T says again that Dish pulled the channels, AT&T was willing to keep them up under the then existing contract. Since there was no warning or rumors that they would be pulled maybe that’s correct.
Save it please. This isn't the DirecTV forum where you live and breathe AT&T's praises. We all knew something was up months ago when DISH stopped including HBO/MAX in the Free Movie Channel promo to new customers and when they announced the $10 a month special was ending.
Who cares who pulled the channels, the contract was up and AT&T wants a minimum sub purchase from DISH (30%) if we're to be allowed to give them our money. Screw them! AT&T should never have been allowed to assimilate Time Warner, or maybe not even DirecTV for that matter. They're too big with too much power and everybody except their greedy shareholders are going to suffer if something isn't done about them.