Payment app Circle are giving away a fiver if you download their app using the code TSR5.
You don't have to do anything annoying, just enter the code when you download the app and they gift it to your account.
Haven't used them much myself, just seems to be a way of sending bunse. Seem to be a legit company when looking at their Wiki page.
IMPORTANT NOTE: You have to go to the promotion section in the menu to add the code