Walgreens has a gift card promotion that could get you a discount of up to 33% off Brinker gift cards. The discount comes in the form of a Walgreens Gift Card.
Staples has a great deal going on for Brinker gift cards. They have e-gift cards at 20% off for $50 denominations.
CardCash is offering 10% off American Airlines gift cards today and Gyft has a promo on Brinker Restaurants gift cards. Both purchases will also earn you 5x UR.