Service disconnected this morning. Mine was set to cancel on the 1st. I was paying $55 total for Xtra with HBO. Called the winback line (
888-333-0804). Was offered Xtra at $75 (plus RSN, 1 TV) along with a $100 Visa card, Sunday Ticket Max, premium movies channels for 3 months. I pushed back on it multiple times, which is a slow process. Couldn't get a $200 GC or the price down. I will say they are definitely willing to run it by a supervisor, though, so it could be work trying.
I was able to add HBO/HBO Max for the year. That seemed automatic almost once I asked for it. They also had to have a supervisor call me later to finish the offer. Sounds like staff working at home aren't allowed to push the offers through for security reasons. Staff working at home also don't always have good Internet (I think they are mostly out of Central America), so that can slow it down, too. Whole thing took about an hour.
Based on my conversations with the winback team, I was given the impression that they'll be able to add those same types of deals that were offered before cancelling. I think they are still willing to give similar rates as before, but you have to do even more for it. For me, that could be $30 off a month for the year, which gets me down to where I was before.
Long story short: You probably can't negotiate on price with the winback deal but you can add programming to the offer. Expect to be paying more, but you might be able to add additional credits by calling the winback team later on.