Nope, more than 10 means less money and more recruiting competition.
Sorry bud
The competition is already there. Stability is even more important than a little bit of more money. In order to have stability, the Big 12 needs to have at least 12 teams and avoid the risk of utter destruction which it has been experiencing for two years now. Baylor, Iowa State, Mizzo, KU, and K St would all rather make sure the Big 12 survives than anything else. Tech knows it has no shot of anything else without Texas, but also needs to save the Big 12 and prevent Texas from being independent.
In the current world with super conferences on the horizon, the Big 12 needs to be a killer or a victim. With 3 teams gone and more that looked for other locations, it looks like a victim. Compare that with the Pac-12, SEC, or B1G, where not one team has seriously looked at leaving those conferences. Even the ACC, weak as it is, is a stronger conference and more stable than the Big 12 and the ACC can easily survive the departure of a team or two.
The decision to remain at 10 after the departure of Nebraska and Colorado was a huge mistake and every school not named Texas and Oklahoma know it.