That behaviour has many different reasons: some people buy the game on sale and then don't find the time to play for whatever reason. Some games come in bundles and you're not interested in most of the bundle, just one or two games. Sometimes I play a pirated version, enjoy it and then buy it but I don't want to play it again so it never shows as 'played'. Some people like to collect games, I have friends with thousands of games and they never play them lol, it's a weird addiction. And some people just... don't like the game. I think I haven't played 80% of my steam library (+/- 1k games).
I never played BaDIK steam version myself, I just bought it because I enjoyed the pirated patreon version and wanted to give DPC some money for making this masterpiece. So, I'm part of the 'never played' stat but in reality I have replayed it 6-8 times.
Thinking about it, becoming a Patron is a better option since Patreon's cut is lower, but I didn't think about that. Maybe I'll do it when the Interlude is released instead of buying Season 2.
Anyone can buy a graphics card and do his own game with his own waifu with that money
There is a 100$ tier (always full, people are fighting to get that spot all the time) ... some people are ready to spend 10k in the development of this game. That's awesome but I mean... that's completely crazy too.
But I think this will be better for the game, this has become a big business and you can throw a fire or two when you have nothing to lose but when you have a million per year business... things are going to be smoother and way more meditated.