I saw won of those stupid "sign up to win free tickets" contests, in this case put on by Penguin Random House, as part of promotion for the audio book of So, Anyway, and went "sure, why not?" I mean, I knew I probably wouldn't win, but it's not like PRH doesn't already have all my particulars... they do send me finished copies of books for review for some of their imprints. I'm not going to end up on any mailing lists I'm not already on.
Short story... I have tickets to a live screening of Holy Grail and a Q&A with Cleese in a week.