Yeah I've said it for a while now, none of this move had anything to do with money. Not that money is bad, but that's kind of like a secondary feature of this. Even in the B12, Texas was making more than SEC schools due to the LHN and LHN money going away is basically paying for a lot of Texas' check in the SEC. The broadcasting revenue will go up, but not like triple, Texas was already making $60m from the B12 and the B12 was set to get a raise this cycle too, which is why the current teams didn't decrease. On top of that, Texas Football made like $100m, more than most athletic departments, in one sport. It prints money without broadcasting. The SEC isn't making Texas rich, Texas is making Oklahoma rich.
This is all about exposure. The Texas/Alabama game last year had more media exposure than every single regular season game in the entire Big 12, including the River, and it was out of conference. It got more smoke than Bama/A&M and this move puts more opportunities for events like that. Per @DFW Horn's point, which was spot on, Texas, along with Alabama and Georgia, is now front in center of ESPN's hype train in a way it never was before. Hype and exposure brings in opportunities and finances that dwarf these broadcasting rights conversations. More importantly, its what fills recruiting pipelines, which keeps the train moving.
That's what this move is about.