Waaaaayyyy too many diamonds required. Just as an experiment I went through a bunch of offers and racked up over 2000 diamonds. Then I proceeded to read a story while choosing the option I liked best and thought would make the story most entertaining. I got through 18 of the 20 chapters before I ran out. It is ridiculous that one choice cost 17 diamonds. Sure you can choose all the free options in the story but it dramatically changes the story and its not worth reading at that point.