Pinfluencers? Pinterest opened up its content marketing API (application-programming interface) to third-party influencer marketing platforms earlier this week in the hopes of carving out a spot for itself in a sector that has been dominated by Instagram, and the new insights that will be available to brands and influencers are already creating a buzz among… https://www.adweek.com/digital/third-party-influencer-marketing-platforms-can-now-access-pinterests-content-marketing-api/