I agree with you on the TV ratings thing GAvol, but the problem for track operators is how do you make $$$ the 51 weeks out of the year when you have no NASCAR. Probably, at some of the older tracks that have long been paid for they can cover their yearly overhead off one big race weekend; however, I don't see how you can pay for a $500 million plus superspeedway and cover your yearly operating expenses off one week of capacity crowds (even with 200,000 tickets).
I really do not know who is financing most of these tracks. Is it private investment groups or are they publicily funded with bond issues?
If it's the private sector, I just don't see how it can last because of the problem with recouping your capital investment plus covering overhead as previously explained.
On the other hand, if it is public money, I don't see how it can keep up becasue these types of public projects are generally intended to increase tourism and tax revenue. The big problem on the public side is that these tracks are never built close to a downtown area due to noise concerns. So, instead of visitors packing into the nice downtown hotels and restaurants you wind up with a bunch of cheap-O roadside motels and campgrounds out near the track, and often in another city/county than the town that the track is associated with.
Maybe I am wrong and 99.9% of the world will one day be NASCAR fans with tracks all over the world that can seat a million fans on raceday and unending increases in merchandise purchases, but I doubt it.