How can Popular Pays stand out in the influencer marketing crowd? The key, according to co-founder Corbett Drummey, is to focus on content.

The approach seems to have convinced investors, with Popular Pays announcing that it has raised an additional $3.1 million, which it rolled up with the $2 million it raised after participating in Y Combinator into a $5.2 million Series A. The round was led by GoAhead VC with participation from Pallasite Ventures and Hyde Park Angels.

Drummey told me that when he started Popular Pays, he assumed that the main value the service could provide was connecting marketers with social media influencers to promote their brands and products. That wasn’t entirely wrong, but he said, “The real value of what we’re doing is in the content…