https://www.meetup.com/lp/paymentchanges
seen on Twitter: if you are using MeetUp it's time to look for an alternative provider: from November they will charge you $1 per RSVP of a FREE event, so if you have 1000 attendees RSVP-ing to your FREE meetup you as the organiser will be charged $1000 per meetup
just a heads up for all the event planners here 😉 (Haon on 2019-10-14)