My point was that they have such a lopsided payment scheme where the mega stars make all the money and once you remove these stars from the equation, you will not get the sort of PPV numbers that are necessary for growth.
If you look at the below figures, they have been going sideways or backwards from their high earning years of about a decade ago. The main problem is that people aren't willing to pay for events without the big stars and also the emergence of online streams where people watch without paying. The higher numbers they had in 2015/16 were purely down to Conor/Rousey, Jones, and one Lesnar fight being active. Remove these and the numbers will fall. And they cant really count on Conor coming back because he wants ridiculous money and isn't guaranteed to stick around for long if he comes back. They simply can't afford to pay him what he made in the Mayweather fight.
http://mmadraws.blogspot.com/2018/01/ufc-look-at-ppv-numbers-by-year-and.html
2006 - 10 shows, 527,000 average
2007 - 11 shows, 458,182 average
2008 - 12 shows, 535,417 average
2009 - 13 shows, 617,308 average
2010 - 15 shows, 604,000 average
2011 - 16 shows, 405,000 average
2012 - 13 shows, 454,615 average
2013 - 13 shows, 468,846 average
2014 - 12 shows, 264,583 average
2015 - 13 shows, 578,077 average
2016 - 13 shows, 641,154 average
2017 - 12 shows, 322,083 average (using 230,000 and 325,000 buys for UFC 218 and 219 respectively)