Pipe, creators of trading platform for recurring revenues, has raised $50 million in strategic equity funding, with a minority portion of the round being allocated to secondary. Led by Jim Pallotta’s Raptor Group and Siemens Next47, participants in Pipe’s latest round of funding also include Shopify, Slack, HubSpot, Okta, Chamath Palihapitiya, Marc Benioff, Michael Dell’s…