Facebook makes 84% of its revenues from advertising

"Facebook posted it first quarterly earnings statement post-IPO yesterday and one number pops out: 84%. That is the percentage of revenue the company made from advertising, representing $992 million of the total $1.18 billion it brought in during Q2. To maintain stable growth, Facebook must diversify its revenue stream and become less reliant on advertising - a goal that has plagued competitors like Google for years."

Source:  Read Write Web, 27th July 2012