Saw this on iamcal.com.
threadless are doing a secret sale – buy 3 or more shirts and enter the code ‘tenbucks87’ at the checkout and you’ll get them for $10 each. you have until feb 25th – tell everyone you know
A really nice example of a ‘viral’ promotion.
Nothing too clever, just a simple secret discount code at a well-liked and talked about online tshirt store. Why is it viral? Because people are telling each other about it. Easy.