There is no question here that Jon Wilner is creating hype about something he doesn't understand.
The form 990 that he keeps referring to has certain rules about how revenues get categorized and what has to fit into each bucket. While I am not an expert as I only did a little bit of non-profit accounting and that was over 10 years ago at a CPA firm in Colorado Springs this just seems like him trying to create a stir over trying to compare apples to oranges.
The 990 is an IRS designed form, with an instruction sheet that is over 100 pages long:
Instructions for Form 990. And as every tax preparer knows, the instructions are just the "basics" and that there are many letters and other forms that feed into the main form that all have their own instruction forms and other bulletins from the IRS; and then of course there is precedence and other normal practices that depend upon the preparer, tax court interpretations, etc.
The fact that he proposes that "Perhaps the Pac-12 Networks income has been diverted to pay down start-up debt" shows his absolute ignorance for accounting methods and proves he didn't have an expert review this before he wrote his article. No half-way decent CPA would ever allow a client to not report legitimate income that should be on the Statement of Revenue and Expenses (Income Statement) and then report it on the Balance Sheet as a reduction of debt. It's like he just couldn't figure something out that he has little knowledge about and decided to write a negative public article accusing the Pac-12 of nefarious accounting instead of just asking an expert to look into and explain it to him.
What he doesn't say in his article is that the conference DOES also report several other types of revenues beside the TV rights:
Over $100 Million in Post Season Bowl Revenue
Over $30 Million in Championships, events, etc.
Over $20 Million in Advertising revenue
Over $5 Million in "other revenue".
Also they report "Contract Receivables" of over $14 million and over $12 million in "Due from Affiliate".
So...
The issue is most likely categorizing the revenue. I would bet that the Tier 1 deal with Fox and ABC/ESPN absolutely "carve out" how much they are paying per year for the broadcast rights of the football championship game (and the radio deal would do the same). Those revenues are included in the "Tier 1" contract but are most likely allocated to to the "Championships, events, etc" category of revenue on the 990; thus the "traditional accounting methods aren’t used" explanation from the conference about where the revenues are on the IRS form as opposed to the internal financials the conference prepares. The fact that Jon Wilner is hunting for around $25-30 Million in revenues and those figures are about the correct estimate for added TV revenue from a football championship game = poof mystery solved.
If that doesn't solve 100% of his "discrepancy" then there are also timing issues related to accounting and the fact that there are over $26 million in accounts receivable (consistently every year) could also partly explain it.
Could the Tier 1 deal also include some "free advertising" for the conference or for the member schools that has to be reported in a different category? probably so.