Fee, payout and policy changes at Eventbrite, Ticket Tailor, Humanitix, Dice, Luma, Posh, Universe, Tixr and Ticketmaster for organizers, all-in pricing and refund law compliance deadlines, venue rental and insurance requirement changes, city special event permit, street closure and noise rule changes, alcohol and food permit rules for events, crowd safety and weather cancellation rules, sponsorship and vendor platform changes, event insurance price moves and enforcement against organizers, with the platform, city or rule first and the effect on a 300-person event.