Although Pinterest Inc (NYSE:PINS) fundamentally operates as a visual discovery and search engine platform, many users increasingly consider it an artificial-intelligence-driven enterprise. Essentially, AI now underpins nearly every aspect of its operations, from core user experience to advertising tools. On the surface, that would seem to help bolster PINS stock given the intense fervor regarding the innovation. As it currently stands, investors have other ideas.It really comes down to technical performanc ...