Viral marketing of discount code

To viral market a discount code on your own facebook/twitter/blog and discount code sites with third party endorsement of product. Successful bid will depend on number of UK followers etc and ability to spread message virally.
Payment by mixture of one off fee £50 ish and commission (£1 for first hundred orders and 50p thereafter for up to a year) discount code will give 10% off and can be used any number of times over the course of a year by any number of people.
Website which has one of the largest ranges of skins and covers for kindles and mobiles on the net at some of the best prices.