Yes. that is is a bad thing to do. it basically means they have no roadmap planned out for the game.
And are just making stuff up as they go along.
This will probably result in a very bad story in the end.
Yes renders are good but for the story this is probably one of the most stupid things to do in terms of software/game developments. no one do that elsewhere.
but hey this is a porn game with different audience so gotta milk them as long as possible..
well not to mention the game is taking ridiculously long dev time, and the updates are fairly short considering. BADIK releases once a year at this point, but at least followers know the plan, what the process is, and the updates are always quite large.
Oppai-man is apparently making a fortune, hiring a bunch of people and have barely any new content to show for it, since they expanded at least.
I am bitching on a pirate forum, but I have supported Oppai-man multiple times financially and used to do the beta testing releases