I believe that if you have recieved your package, you cannot drop out, until everyone who sent, you smokes, on your birthday have been sent theirs. We have had the occasion, where someone, or actually a couple of people, dropped out after sending out the first couple of months Birthdays. Since I recieved packages from them, I sent them packages, on their Birthday, though I am sure, they didn't expect packages, from those who they didn't send cigars. I have started a promptness thread, on trade forum, for any of the BOTL that are behind, in the Original Birthday Club. This is a thread for them to acknowlege being behind, and have the opportunity to correct this situation, and save their trading status, from negative posts. Myself, I didn't keep a database, of what was sent to me, or what I sent, just that I sent a package, and marked them off the list, of packages needing to be sent. If I missed anyone, shoot me an email, and I will correct the problem.
Later
Dave (A.K.A. Homebrew)
P.S. I'm sure some people are just late, my birthday was in April, and I got a box, in August.