We asked $PUBM Co-Founder and CEO @RajeevGoel about the differences between the dot-com era infrastructure build out and today's AI build out: "I had a startup in the late '90s [Chipshot(dot)com] and I learned a lot of lessons..." "The biggest difference I see is all of the customers of the late '90s tech boom were unprofitable startups, right?" "VC money that was being used to buy hardware, bandwidth, and infrastructure." "Now what you see is profitable companies investing in AI. If…