May 28, 2013 No Comments FREE Menu Item at Burger King Sign up for Burger King BK Rewards to get 50 BK Crowns, good for a FREE Whopper sandwich or any other individual menu item. Earn BKSM Crowns with every purchase and receive special coupons. FREE Menu Item at Burger King Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.