If there has already been a thread on this, fuck off fucker.
Go to Eat and buy something.
On your receipt it says "Tell us about your experience at www.EATlistens.com"
Go there, fill in the survey (takes 5 minutes)
Write the number down on your receipt
Go back to EAT, swap the receipt for a hot drink OF YOUR CHOICE.
Get a receipt for your transaction... AND REPEAT.
fucking laughing mate