This is a extremely powerful concept popularized by offerings like GoFundMe and Kickstarter. This means that the non-profit mobilizes their constituency to raise money for them through their network of contacts. Furthermore sophisticated designs even allow some automation to this. For example, one software offering allows the “campaigner” to upload their contacts from their phone and the system will send out messages to the contacts. Therefore this is a very powerful and elegant use of the web. A nice example of Peer to Peer Campaigns is a site called CharityWater.org.