Due to Title IX and because BYU participates in certain federal programs like allowing students to get federal student loans and pell grants, BYU is required to disclose certain financial information, including financial information on its athletic department. BYU generated a whopping $41 M in athletic revenue. I haven't checked all the B12 schools, but my guess is that BYU would be the smallest revenue generating school when compared to the B12 schools last year. Texas generated something like $130M.
The original post is full of crap. (Edit: This should have gone under the original post, not under Bucko)