What the "Newsisfree.com" site says about their Memestreams feed:

] MemeStreams
]
] The links in this feed are chosen by a flat democracy.
] When a MemeStreams user recommends a link, it is counted
] as a vote for that link to appear on the main page, and
] the page for the topic it was recommended into. This feed
] shows the most popular links

News Is Free: MemeStreams: Information About This Channel