I don't see it as rent seeking since there are production costs to these classes but $40 is way too high. $2 is more like it.
Even in the middle of my small town, drop in classes at the gym at 8$ each, on top of your monthly membership.
Fwiw I dont own a Peloton, I prefer running, I just dont think its nearly as bad of a deal as people make it out to be
Just because something can be offered cheaper at scale, doesn’t mean it should or needs to be.