Thirty-six percent of marketers surveyed by email marketing services firm Campaigner revealed that their sales increased when they integrated a buy button into their social campaigns. The survey, which includes feedback from 506 email marketers, also showed that 60 percent more marketers expect to use buy buttons this coming year.
Of course they did... any opportunity you give, that is not intrusive, to your audience/customers to buy will increase sales. There is no mention about the percentage of conversions, the percentage of referral traffic vs. other sources, or about that offer being shard or recommended by others. Let's be clear that is not "social commerce"... it is simply a purchase referral from another source, that being a social platform.