Game of Thrones Fans Anxious to Cancel HBO Subscriptions After HBO's hit series Game of Thrones came to an end last night, fans are allegedly anxious to cancel their subscription to HBO. The cable service has been experiencing a mass exodus of subscribers since the end of the show last night, and that petition asking for HBO to redo the final season didn't help at all. One fan on Twitter wrote, "The Game of Thrones finale was actually better than I expected. Completely un-relatedrelated - does anyone know how to cancel an HBO subscription? Asking for a friend."