UFC is currently suffering lower average buys for events in conjunction with the deterioration of UFC PPV buys (which has gotten even worse)
https://www.mmamania.com/ufc-news/313759/report-ufc-suffered-lower-average-buys-per-event-after-already-bad-ppv-numbers-got-worse
It would seem the DWCS model has failed and filling cards up with unranked fights between low value bums no one cares about has devalued the product