4 Weeks of Blockbuster Online Trial for free after code FREETRIAL0618M.  Be sure to click on 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 for your reference. You get to have 3 DVDs at the same time, plus 5 in-store exchanges.
Originally posted earlier, this is just a friendly reminder.