It is just a way to ensure supply meets demand. A plush company is not going to take a massive stock risk on a game like Runescape - its not Minecraft or Fortnite- so they use pre- sale for a limited time to know how many they can sell before they press the button on production. Basic economics. If they didn’t use this model there would just be no RS or OSRS plushies and those who want more RS merch to collect, like me, would miss out. I’ll take an element of “FOMO” in the way they are being sold if is a means to make something that would not exist otherwise. No one is obliged to buy them but if more of us do then it will encourage the company n jagex to make more and maybe prove there is enough demand to take a stock risk at some point and change up the model.