firstly, theres really no prelims as its all on ESPN+
secondly, i feel like we see this for just about every event now. Lets say there is a ppv, with a televised prelims on ESPN, and early prelims on ESPN+. i guess some sherdoggers havent noticed, but they will typically put the better fights on ESPN+ and the televised portion might get one or two names to main event the TV portion, but weaker overall. then the ppv will get their guys.
its a strategy to get more ppl to purchase espn+. they dont need to entice ppl as much anymore to order the ppv as much as they need to get them to get espn+ first.