That's funny, book club you can't unsubscribe from. Back in the 80's, there was just such a club, get 12 hard cover books for 99 cents, and then we will keep sending them until you go into witness protection, or die! The subsequent books were like 40 bucks a piece.
Obviously, Scientology is that, on a much larger, much more expensive scale!
Reminds me of that movie with Alec Baldwin, Glen Gary Ross, him screaming at them ABC-Always Be Closing!