Not the whole market at the high end either, I have very little trouble getting any pair of Balmain, Versace, and Rick Owens sneaker I want - I have several dozen pairs of all three brands

Strategy at the high end is to price correctly but astronomically so almost no one can afford them, then offer seasonal sales to sell the less popular colorways or styles off to the aspirational upper poor.

Nike/Adidas is like the polar opposite, intentionally underprice so demand is frantic and there is a lot of action for middle men, then over the years try to steal back as much of the middle men profit as possible

All very interesting imo