a16z's @droovg explains why ChatGPT and Gemini struggle to find the best startups to work for, and how Cosign is building the missing data layer: "One thing that LinkedIn will never do is introduce an MCP that allows you to have vast search access over the graph." "When I was in New York this summer, I wanted to start meeting people who I thought I might be able to work for one day." "So I Googled, who are the best startups in New York? Gemini gave me a pretty bad answer. I switched to…