why are cosmetics so insanely expensive in pubg?

im a long time fan of the game but ive always wondered, especially with things like the progressive skins, (i managed to unbox an over the rainbow m24) getting schematics to upgrade the guns just seems rediculously difficult. am i missing something or does it just take a buttton of money to upgrade progressives / buy other skins and such?

i understand the games not completely dead but i dont see pubg being popular enough to justify theses costs, especially with garbage shops that only rotate every like 60 days it feels like