A majority of real life companies have "refer-a-friend" deals that are a very low cost way to acquire new customers. In SL, referral deals are even more effective due to the ease of communication between avatars and the viral aspect of SL. MutualWin for free aggregates the referral deals that are available and adds a new element. It encourages charities to become the "referrer", giving companies both a new method to acquire customers while helping non-profits.Questions?[Removed for spam]