This document discusses two types of economies: commercial economies and sharing economies. A commercial economy is based on exchanges of goods and services for money, while a sharing economy is based on collaboration and participation without monetary exchanges. The internet has enabled both types of economies to thrive. It allows e-commerce to reach niche markets through platforms like Netflix, Amazon, and Google. It also facilitates sharing economies like Wikipedia, which runs on volunteer contributions motivated by a desire to share knowledge for public benefit rather than personal gain. Both commercial and sharing aspects are now hybridized online, with new technologies supporting more social behaviors and participation.