What's the point of modding when the actual game isn't finished yet
That's most games on this website. Most are unfinished, and many of them that include mod support (that are popular enough) get mods. Degrees of Lewdity is a good example. Clearly there isn't enough interest in Joody's game for people to make noteworthy mods for it.
all you can do by now is to show boobs and get fucked once in a while..., there are like 2 or 3 different repetitive sex scenes, do you call that a fully functional game?
Yes, it has multiple game mechanics and an explicit win state. There's nothing preventing you from reaching that win state, so it's functional. We can go back and forth on what defines a "fully functional game" and then we'll be digging into some weird arbitrary limit about how many features a game must have to be fully functional, which is a discussion that doesn't really have much of an end.
Not all games need to provide 40 hours of first-play-through content or whatever. Some games are small, some are large. We'd all like the game to have more features, but if Joody never updates the game any further, I'd say the game stands as a functional game.
Instead, a more useful discussion is: The game is sold for $10 on itch.io. Is it worth $10 in its current state? That's a question that actually matters. No, I don't think so. $10 is food money for me. It might be worth $10 to someone else. I'm sure you wouldn't consider it worth $10. However, paying $10 means in the future (afaik) that the customer is entitled to any updates that get put on itch.io, so that's likely why Joody didn't set the price lower than $10. But updates aren't guaranteed, so.
Mind you, this is a game piracy site, so most people on here aren't paying $10 after they pirate it.