You have chances of less than 1 in a hundred thousand to get certain characters, to the point someone spend the equivalent of thousands of dollars to get one character (and failed). You can then pay more to choose the character you want from this.
Oh, and the kicker? If you fail to get a certain character, you don't have another chance for... 12 years. No really.
So yeah, a very interesting video with details about Grandia, Puzzles & Dragons, Monster Strike etc. Personally, I wish this genre would die a horrible death.
What do you think?