With the World Cup underway, it serves as a reminder of the role of marketplaces in event tech, including: Ticket marketplaces (Live Nation, DICE and SeatGeek) Venue marketplaces (Event Inc., VenueE and PeerSpace) Planning, financing and execution marketplaces (HoneyBook, Maroo and Platerrz) Event tech is still a small segment within marketplaces, with event marketplace startups worth a combined $25.4B. This…