4 Weeks of Blockbuster Online Trial for free after applying coupon code bbstore. Be sure to select Have a Promotional Code as shown in this screenshot. The trial period then shows up as 4 weeks on the sign-up page. Here is another screenshot confirming the 4-week trial fr your reference. You get to have 3 DVDs at the same time, plus 5 in-store exchanges at physical Blockbuster stores.
Originally posted earlier, this is just a friendly reminder.