If you have follow his work, you will know that this is only one of the project he's working on. He have other game and artwork as well. Next time if you want to say something bad about someone, as last do some homework dumb ass.
I don't think you should be slinging insults around and requests for people to do research when it's clear you haven't done any yourself despite the fact that they are working on multiple games the progress of said games happens at such a slow pace the words Patreon milker would be a perfectly applicable term for these Devs.
Iris Quest has demo content dated back to Aug 6, 2015
Library story has demo content dated back to Sep 30, 2015
Now to verify the accuracy of the term Patreon milkers when it comes to these Devs by referencing another game.
Yandere Simulator a possibly famous game now, was originally worked on for more then 2 years by a solo Dev coding in and engine more difficult to code for then Renpy. He also did a lot of asset design by himself for a long time before his fans started helping out. His game has a whole bunch of mechanics and maps that had to be individually coded and designed.
E.g. An entire Japenese themed school with multiple room types multiple AI characters with there own daily patterns like where they go and what they do extra buildings outside the school also a home and basement for the main player and a town.
E.g. Mutiple kill mechanics.
E.g. Multiple Characters all with there own looks clothing styles and personality's.
The point being in 2 years alone the Yandere Dev had accomplished a massive amount of work compared to anything these and yes i say it again Patreon milkers have ever accomplished.
Now don't be miss-lead i actually like library story and what I have seen so far of iris quest but if there is one thing we can be damn sure of it's that these devs are milking the hell out of there games with extremely slow releases and low amounts of contents, but hell it's there game so it's there choice.
FYI: Took less then 5 minutes to do the research