The topic of UB is continuing to create controversy as the number of non-Magic IP products explodes. The Professor put out a recent video on the topic predicting a future Universes Within product to make up for all the unique UB cards being added to the mix, but looks like MaRo has quickly shut that idea down.
What are players who don't like UB supposed to do when there are no Magic versions of those cards? This is now just reality.
It always depends on demand. If some new deck out there gets super popular and needs a playset then the price will go up.
For now it sees basically no play outside of commander, but is fairly popular there so the price is unlikely to change.
Interesting makes sense commander is actually keeping the price up. I also had a scavenging ooze at the time it spiked but failed to sell because I was too lazy to figure out online shipping and didn't like game stores, since I just played kitchen table commander etc from the start.