Here’s what consumers have asked with answers from Meetup staff and previous consumers.
Unfortunately the administrators don't Regulate what groups are created. So anyone can create a group and do it they want with it.
No, Meetup.com has been around for over a decade. It is not a normal business in any sense. The only thing you need to know is that the organizers have free reign to build whatever "group" they would like as long as it violates no laws in the territory, province or state it operates in. And all members must be over 18 years of age everywhere in the world.