It takes a lot of gems to get the most out of the story, it's not a big deal, if the stories were actually finished, and often "end" on a pretty big cliffhanger, which is super annoying, why pay quite a decent amout for a story that's probably never gonna get finished or it will take a long time, there are stories that are unfinished for years now, they are just long enough to get u interested in the plot so u buy more gems and then they just "end" on a cliffhanger.