As CMO of Fun.com and HalloweenCostumes.com, Mark Bietz has transformed a niche seasonal player into a $200M+ D2C powerhouse. By prioritizing data-driven digital strategies and innovative product offerings, he led the brand through a 20x revenue expansion. A recognized expert in the evolving e-commerce landscape—including the shift toward "agentic commerce"—Mark also acts as a fractional CMO and advisor for venture-backed startups and private equity portfolios looking to scale their digital footprint.