As you can see in the last screenshot, currently there are 16 bad endings and 1 good ending. I went through them in about 2 days.
And all of that is only for the first chapter. As there will be 4 chapters in total when the game will be finished, we can deduce that there will be about 49 bad endings in total ! I think it's totally worth the 30$
Plus, the artworks, the game mechanics and especially the soundtracks are premium quality, so I really recommend it if you like visual novel and want to support the group ;)