Most assume revenues, upon which caps are based, will continue to rise.

History says that's not the case, that it will not rise forever. At some point revenue will become stagnant and/or fall.

Attendance was down across the board last year, with only a handful of exceptions/markets. Ditto viewership. Don't think that won't affect revenue as TV contracts and advertising are renewed should this trend continue. Although it's a lag effect, it will be huge if the NFL has to take an ad cut.

So, whether or not the CBA changes - revenues likely will. Right now it would appear to be a cash cow that quite frankly defies logic.

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