Quoted: Make a loan to an entrepreneur in the developing world for as little as $25. Kiva is the world's first online lending platform connecting online lenders to entrepreneurs across the globe.

Quoted: In 2002, Google launched one of their few pay services, Google Answers. The service attracted only 800 responders in the past 4 years, and was shut down a few weeks ago. Three years ago, Matt Haughey created Ask MetaFilter, pays no money to those who answer questions, and has turned the site into a successful part of his business using, in part, Google AdSense to support the site.