I would say just looking at the Forbes numbers for the Jets, and comparable smaller market franchises like Nashville and Carolina, that attendance makes up roughly 1/3 of revenues. I would imagine TV/corporate sponsorship is worth another 1/3. And the remaining money comes from other forms of revenue sharing, such as merchandising, and actual league revenue sharing. I don't think you see expansion for another 3 years, maybe within a year or two the actual bids are submitted. Houston's owner is still fighting with the NHL over what a franchise is worth, so that might open the door for Arizona coming back. Rogers TV deal expires in 2, so you might get some more revenue there, as the NHL probably splits the deal between Rogers/Bell/Amazon Canada this time around.
If the Jets attendance dips below Utah's, which is 11 000 and change capacity this year, I think there are going to be some red flags thrown up, again. Stay in 13-14 000 range and that's probably a profit for Chipman and company with a playoff appearance.