Actualy, the NSA - just like the CIA, is known to carry out false flag acttacks to achieve a certain outcome. This point should not be overlooked.

In this case Meetup is a perfect NSA 'false-flag' target because it's not a financial institution (NSA ally), and yet is used by millions of people. Thus millions of people starting to ask if GCHQ/NSA will keep them 'safe' online.