With the new SEC television package, I don't see how expansion is off the table. How can any of the other conferences stand pat with the deal the SEC has and the Big 10 with it's conference network? Vandy & Miss St will be making more than Notre Dame with it's own tv contract. Imagine that. Please don't think that any of the SEC lower tier teams will be leaving anytime soon. The other conferences have to have better matchups. Nebraska should be playing Oklahoma every year, the Big 10 needs to add someone who can compete with Michigan & Ohio St, the ACC & Big East football schools should have merged. Talk about a tv contract possibility. Maybe the Big 12 should go after the Ariz. & Utah schools, or the Big 10 goes after Missouri, Iowa St, Kansas, Kansas St & Nebraska a true midwestern conference. Conference makeups & matchups will determine where the big bucks will go. Every conference has it's alpha dogs but you need more than two or three.
The 'everyone' comment in my post was directed at folks who will still suggest that the SEC WILL expand. It is my contention that the SEC will NOT and probably about 99.99999% of the folks would agree with that.
It was not to suggest that other conferences will NOT expand. I agree with your premise that the other conferences will look at ways to increase their revenue streams. I disagree with you about the Big 10 expanding simply because they are almost making the same money as the SEC. The article in the other part of this site mentions that. If the BTN continues to expand, then the Big 10 will make MORE revenue from TV than the SEC.
The other conferences are going to wait and see what happens with the Big 10 network. As it continues to make deals, other conferences will take notice.
One other thing, other conference will only expand if it makes financial 'cents'. That means going into markets with lots of population with only one team that garners state wide support - or at least will allow the conference to put their TV network onto cable systems.