Thanks for the answer! We're aware that games are published while still in development, but I was more curious if people find it something "worth it" compared to making the game/page public just when the game is finished. I apologize if my previous question wasn't clear enough.
I do not understand the question. You can sort the in development games for top-sellers, and you can look at the top-sellers regardless of publishing status. You will find non-finished games there.
You have to consider your audience. And who the developers are. Releasing early is most of the marketing a small or amateur dev does, because it costs nothing. Also, you might get a sounding board how your game will be received and get free alpha testers.
It also depends on the fact, if you have a publisher or not. Itch is self publishing and low no entry bar. So one could say, people do it, because they can do and the real question is, why not everyone does it so.