Only 16 percent of social media users say they are more likely to buy from companies that advertise on social sites.
只有16%的社交媒体用户表示，他们更有可能从那些在社交网站上登广告的公司处购买产品。
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That would be the people who buy advertising from them—and Facebook and Google, the two virtual giants, dominate digital advertising to the disadvantage of all other media and entertainment companies.