A nice article, but David only posted the first half with a teaser at the end. evonomics looks like a nice site, browsing the table of contents.<p>Google aggregates small $1 charity donations in One a Day, and then periodically bills you for a few weeks worth of donations. I don&#x27;t see why individual companys couldn&#x27;t provide the same with micro-payments if they were federated so one service would allow people to micro pay on any site supported by a federated partner.