Remember that each member's Booster Pack offering will be a little different so that no one should ever see a card he already owns in his Booster promotion. I bought the Big Boobs pack, and as soon as my new cards were safely in my collection, another Big Boobs Booster Pack was offered to me with 10 entirely new cards. I've also noticed that even if I don't buy a Booster Pack, its contents may vary slightly from day to day. I'm guessing that as long as we don't own all the cards (I'm about 200 cards shy) and as long as the Booster promotion continues, we can keep buying and buying and never receive a duplicate. Next to the monthly memberships, buying Booster Packs is the quickest and most economical way to grow your collection.
Speaking of which, will we get fair warning before the Booster Pack promotion is discontinued?