by Ben Pines for HubSpot According to Aspire, influencer marketing spend in the U.S. will reach $4.6 billion in 2023. Five years ago, the market was half this size. Get Started with HubSpot's AI Campaign Assistant One of the biggest challenges with influencer outreach is actually reaching them, without getting ignored. Standing out in a sea of cold emails requires a personal and tailored approach but that isn’t always scalable – that is unless you have AI. Find out how to leverage AI for a tailored outreach approach that speeds up the process. Using AI to Craft Your Outreach Messages One of…