Reddit,

Joshua Kushner, Peter Thiel and Marc Andreessen joined with Jared Leto and Snoop Dogg in a $ 50- million round, led by Y Combinator’s Sam Altman. The next year, the founders came back and shifted the company’s focus to a long- overdue move into mobile, tools for publishers and plans for generating more revenue. With Huffman now as CEO, the San Francisco company is experimenting with various advertising formats and a premium subscription service.

The design of the Web site, the self- proclaimed “front page of the Internet,” hasn’t changed much in all that time. The cramped text and seemingly endless comment threads can make pages difficult to navigate. Many people don’t seem to mind. Research firm Alexa ranks Reddit the fourth most-visited site in the US and seventh worldwide.