I received an email saying:
Dear ,
Happy Birthday from Earl of Sandwich! To help you celebrate we've added a free brownie to your account, for use any time in the next 30 days! Just visit your nearest store, and redeem it like any other Royalty Club reward!
I assume that means it was loaded onto my card, but I don't have a card. So not sure what to do about that. I didn't redeem them.