If you bought the beginning based on the implicit (and explicit) promise that the story would be finished, because A. stories usually have an ending, and B. the

If you bought the beginning based on the implicit (and explicit) promise that the story would be finished, because A. stories usually have an ending, and B. they've both said many times that they are going to finish them, then yeah you did kind of get cheated, you bought them under false pretenses. If George R.R. Martin wrote 5 books and told everyone "Hey, here's half a story, I'm never going to finish it", most people probably would not have bought it and HBO probably wouldn't have spent millions of dollars producing a TV show about it.