It's for gas expenses up to $250, which in a way is plenty enough for me on top of freedom's $1500 cap.
Wanted to add my thanks. Would never have known about it if you hadn't posted about it. Thank you, Dani!
I think the $250 cap is kind of lame. I only buy shell gas for my truck, think I'll be sticking with my BofA Cash Rewards until discover puts it in the summer rotation.