Instagram has more advertisers than Twitter

"2015 was a big year for Instagram’s advertising business. It rolled out new ad formats that could contain links, expanded the length of its video ads and, most importantly, made it easier for advertisers of any size — and increasingly anywhere — to buy its ads and target those ads.
Seemingly as a result of all those moves, Instagram now claims more than 200,000 active advertisers as of February 2016, the Facebook-owned photo-and-video-sharing service announced on Wednesday. That number may pale in comparison to Instagram’s parent company — Facebook claims more than 2.5 million advertisers — but it trumps Twitter, which had more than 130,000 active advertisers as of the fourth quarter of 2015.
The comparison between Instagram’s and Twitter’s advertiser numbers isn’t an entirely fair one. Twitter has built its advertising business on its own, while Instagram has been able to stand on Facebook’s shoulders. For example, advertisers can buy ads on Instagram using the same self-serve tools from Facebook that they use to buy ads on the larger social network and with the same level of targeting Facebook offers. But still, at the end of the day, more advertisers is more advertisers."

Source;  MarketingLand, 24th February 2016