I mean, all of their "NSFW" shoots are pretty much on the same level as Liv's. It's not like Liv's set showed dramatically more than the others. The main thing is that they're charging a lot of money for content that's like you said, Instagram-level than what many people would expect at those prices. There also aren't as many people around the forums as there used to be who are willing to buy and share this kind of content.
And when you think about it, the rotation has always been pretty similar. Like, If Liv were still around, her $300 sets might have been a little more revealing, but probably not by much, there would've been more of a balance, rather than having it feel like Liv's shoots were always the ones that stood out while the others stayed at roughly the same level. Right now, Bells is pretty much the only one who's done multiple $300 shoots, I think around seven in total, including the duos with Lindsey and Mar. Niki is the only one who hasn't done a shoot like that yet, and she also seems like she'd be the hardest person to convince to do one