And as for “no FOMO”, that’s just straight up, uncomplicatedly untrue.
Most predatory in-game shops create FOMO by offering exclusive items for short time windows only. Or they offer massive, often personalized, timed discounts on overpriced items. Or they offer expensive purchases of previously timed exclusive in-game items.
I’d argue that it’s not impossible to run a “no FOMO” cosmetics shop, but it probably wouldn’t be very profitable. No idea how Inkbound’s shop worked, though - I never played the game.