The niche adult game market, made even more niche by this specific fetish of TF, is notoriously and understandably incredibly hard to monetize. While DRM is a hard to implement and also controversial measure, I don't blame the dev for trying something. This is like the "No take, only throw!" dog meme, people want the dev to release frequent and content filled updates, but don't understand that they need to make a living off the product to do so. The more the dev has to work irl the less time they have to spend on the game, and the less extra assets like art and music etc they can afford to commission for the game. Take the DRM as a desperate cry for help and just support the dev if you can guys, cmon.