Global Spectator Sports Market Size, Share & Demand Report By Revenue Stream (Media Rights, Sponsorship, Ticketing, Merchandising), By Sport Type (Soccer/Football, Basketball, American Football, Baseball, Cricket, Tennis, Other Sports), By Fan Engagement Platform (In-Stadium Attendance, Traditional TV, OTT & Streaming, Mobile Apps, Esports & Virtual Events), By Region & Segment Forecasts, 2025–2030