From iA wiki
See also: Gift Economy
Affero the company - Enabling Commerce and Reputations for Authors and Consumers of Online Works -- How does Affero work? Simply register and you can create one or more unique web addresses (URLs). Once you associate one of your URLs to your digital work, others can recognize you with ratings, feedback and or financial contributions. Affero is working to enable commerce for online publishing without digital rights management style restrictions on the distribution of the works. They have developed a model for authors and readers that simplifies giving back as a form of appreciation for another ones gift to the commons. They also provide a reputation service for the authors and readers. Each member gets a profile that lists ratings from others with details on the ratings.
Affero's software project is a free software project that enables ratings and donations for digital works. The project is released under the Affero General Public License, which is a derivative of the GNU GPL.