This is the 2005 ISC Annual Report:
This is the 2018 ISC Annual Report:
Is admissions way down? Yeah. "Motorsports Related Income", the line item where
media rights comes in, is more than double in 2018 what it was in 2001 at the advent of NASCAR having a unified television rights strategy. Even in 2005 at NASCAR's popularity peak, TV revenue was also double the revenue of admissions. I apparently must also clarify (since this is difficult for some to grasp) that the income derived from admissions was and is not a figure isolated to NASCAR races. This is why the media rights matter so much.
Now, again: What is the rationale that NASCAR is owed a greater share of the media rights based on the fact that the attendance has dropped? NASCAR is the promoter! They run the series! It's their responsibility to put in the work to engage new fans and grow the audience, not the teams. If the attendance has fallen dramatically, they are the primary ones at fault.