Title: How does Twitter make money? - BBC News
Headings: How does Twitter make money?
How does Twitter make money?
'Native' marketing
Using the 'firehose'
International users

Content: Twitter may have about 232 million monthly users, but the company is not profitable - yet. So, how does Twitter make its money and how can we explain its high valuation? In papers filed with US regulators ahead of the listing, it was revealed for the first time that Twitter made a loss of $69m in the first six months of 2013, on revenues of $254m. But analysts say the company is showing strong signs of growth, with revenue rising from just $28m in 2010 to $317m by the end of 2012. One research firm, eMarketer, estimates that Twitter's revenues from advertising sales will increase by more than 100% by the end of this year. 'Native' marketing
Almost all of Twitter's revenue - about 85% of it - comes from advertising on its site. There are three main ways for a company or an individual to advertise on Twitter: by promoting a tweet that will appear in people's timelines, promoting a whole account, or promoting a trend. Only last week Twitter changed the way posts are displayed in the timeline feed, allowing photos and video previews to appear without needing to click on a link - a move some analysts say will help advertisers to better show off their content. Twitter tends to charge its advertisers according to the amount of interaction their content generates.