what about just the old way, google groups or email lists? otherwise, I still see certain business model shall work for meetup, how about when meetup charges a

what about just the old way, google groups or email lists? otherwise, I still see certain business model shall work for meetup, how about when meetup charges a fee for its members then it shares some percentage of that fee with meetup? otherwise it will be free. and what about eventbrite.com