Whatever the game, I don't appreciate exclusive content for a happy few. There are less discriminating ways to thank the biggest contributors, be it posting a page with their names at the conclusion of each episode, giving them more votes, creating more interactivity whether with the name of future characters, new clothes or haircuts.
But at a time when NFT are growing, I still find it absurd to oppose the sharing of a digital file. By trying too hard to monetize your creation, you end up disrespecting those who, even if they are not "whales", actively contribute to the popularity of the title.