I don't even think this is a false positive. They claim the conference is 'not for profit' which sounds all nice and fluffy, but it is sponsored by three orgs [1]. Even if they don't turn a profit on the first year they're still building the brand of the conference.
The takeaway here is don't try to use Meetup to promote your conference.
The takeaway here is don't try to use Meetup to promote your conference.
[1] http://summit2013.reversim.com/