Games are not like TV series, in every other genre, FPS, RPG, Platform game, racing game, ANY other game will have maybe alpha, then beta then finished game (always called 1.0). If it's a small indie developer, you may buy the beta to support them, but you know 99% of the time you will have the full game eventually. If you check Itch you will see many Adult VN games (at least 60-70%) that have not ha an update for many months, sometime even years. Sometimes you can find out that you can buy a 0.3 version and be told if you want the 0.9 version, you need to go on Patreon. Many devs say the game is $10, but then says you can only get the game on Patreon, then you go there and find out you can't download the game on a $1 a month, you can only download it on a $4 a month Patreon, so how is the game $10?! Finally, many adult VNs are called 1.0 or higher, when they're still unfinished. This can only be to confuse the customer!
This means many games are never going to be finished, yet Itch keeps them up here on their site. To me, Adult VNs and Itch.io are the dodgiest "three shell" games and website in the whole gaming market. I have wasted too much money on unfinished games that I know now will never be finished. I am just not going to do that any more. And yet gamers are now so dumb I often see comments giving a game 10/10, when it's barely a finished game! So you carry on deluding yourself, and I will spend money only on games on steam where you can ask a comment asking if it's the full game, and if the response is "yes", then i'll buy it. Itch doesn't have this, so, you won't see me much on this site any more.