You are right with this point, like many others have said this before you.
But two things to consider:
- This is not a regular VN, it's sandbox/open world. This means there's much more things in the background, than "just choices and variables". The dev made and remade and refined the UI and the mechanics many times. Most of the updates since 0.3 are game mechanics. It's not as visible as 2-3 sex scenes, but it's just as much work.
- The current update doubles the scene renders, which means actual events. The current render number in 0.5 is a bit over 1000. Sure, it's not a lot in 2+ years. But if you compare it to 0.4.5, which came out 7-8 months ago, then that 500 renders in those 7-8 months are a much better number. And if the dev keeps this pace (which he can with the current support), then this is going to take off very nicely.
And yes, I know we're on a pirate site, but if you check out subscribestar, the next goal is to get another person to help with the game.