Tylenol teamed up with the Arthritis Society to promote the Walk to Fight Arthritis by offering discounts on arthritis medication. They wanted a quick and easy way for people to get the coupon (if they liked the fan page) and share stories of those involved in the walk.

This Facebook tab shows two different states: one for those that have not yet liked the page, and those that have. The incentive to like the page is that you can download a PDF coupon once you do. Visitors can also scroll through a number of stories linked to the walk.