According to Billboard, Metallica have contributed to a $13.7M investment in Medallion. That direct-to-consumer platform is working to assist artists with efforts to build relationships with their fans. The funding round, which was co-led by Dragonfly and Lightspeed Faction, included contributions from Coinbase Ventures, Infinite Capital, J17, Third Prime, Zeal Capital, The Chernin Group, Metallica’s…