Plinkd

Easy Social Web Hosting
Plinkd is all about getting your hands on the hottest applications for your website while being able to build a discount based on referrals you make to Plinkd.
Plinkd created a concept for linking people together so that they can all benefit from a community discount. It's called Community Connections. Using Community Connections you can invite friends to join Plinkd, this creates your community, every person they invite adds to your community.

http://plinkd.com