itch.io

Have you actually gone to his patreon or the actual Rack 2 website and read the Q&A section? Because if you had, you would have learned that he plans to release the game for free after it is closer to being fully developed, and even says multiple times that it's only available to patreons and those who buy it through Itch.io right now because it is still in development, he even says that he prefers to make money on patreon instead of trying to make the game around sale strategies so that he can focus on the development of the game, so you don't have to pay for it as long as you have the patience to wait long enough for it to be released