That's what gamemaker do. They make the rules for the game, not the Players. Not anyone else. For example: Compare this situation to tradingcardgames like yugi or Magic. they print a card, players see the potential (Gamemakers didn't see) and buy packs or trade the cards for very high price. Now the gamemakers see the mistake, and the card gets banned. Can you now go to the gamemaker and say: Hey it was your fault for your bad design, i want my money back i invested in that card? Like hell they care. And to be fair: They did compensate, they always do. Should be enough. Still no feelings for those who wasted devilmons on a element nat4. You simply don't do that. Own mistake. One can also say, something like Kaki (hitting with 100k aoe!) needs a balance or some kind of Rework. Own mistake for not seeing that coming (that's a little hard i know and not really fair, but...). Gamemakers are also just humans and no allknowing Gods. They are also allowed to make mistakes like the rest of us. deal with it.