From the article
Methodology
I used data on athletic department revenues and expenses, historical AP poll appearances, and FBS and FCS football game attendance to assess how potential expansion teams compare to the expected 2026 compositions of the Pac-12 (Boise State, Colorado State, Fresno State, Oregon State, San Diego State, Washington State, Utah State) and the Mountain West Conference (Air Force, Hawaii, Nevada, New Mexico, San Jose State, UNLV, Wyoming). For each dimension within the data, I calculated how many standard deviations each team differs from the current conference average. A value above zero indicates the team outperforms the conference average, while a value below zero indicates the team performs worse than the conference average.
TV numbers aren't directly in the graph. Attendance is and general athletic department budget. But yes this seems to be missing arguably the most important factor, probably because these numbers seemed to be held secret by media partners