A lot has been written about how people go on Pinterest with shopping intent. It's a way to window shop the entire internet, curated by friends. They never really monetized it much though. Individual influencers made money by leveraging referral programs.
It seems like Pinterest was way ahead of the curve when it came to having image-heavy content and a heavy focus on lifestyle products. But they missed the boat on video and a lot of the influencers moved to Instagram or Facebook.