Hsieh originally got involved with Zappos as an advisor and investor in 1999, about 2 months after the company was founded. Over time, Tony ended up spending more and more time with the company because it was both the most fun and the most promising out of all the companies that he was involved with. He eventually joined Zappos full time in 2000. Under his leadership, Zappos has grown gross merchandise sales from $1.6M in 2000 to $840M in 2007 by focusing relentlessly on customer service.