Tangentially, over the last decade or two Meetup.com has allowed me to meet countless people in multiple countries, of whom some became friends. I've got such value out of this commercial service that I frequently find myself worrying about its business model. To me, Meetup is close to being the holy grail: an independent company, an excellent web client with no need to install an app, and it's not integrated with the corporate social platforms. I so want them to continue to prosper.