StumbleUpon Business Model

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Other Successful Web-based Business Models

Amazon Business Model - check out the Amazon Business Model section
Craigslist Business Model - check out the Craigslist Business Model section
eBay Business Model - check out the eBay business model section.
Google Business Model - check out the Google Business Model section.
NetFlix Business Model - check out the NetFlix Business Model section.
Skype Business Model - check out the Skype Business Model section