The network of local community groups is facing what he calls a massive attack on its servers for the first time in its 12 years. Extortionist hackers are behind the attack, trying to elbow the site offline, demanding ransom that Meetup refuses to pay. Meetup.com didnt manage to crawl out from under the attack until Friday morning, and even then it took many hours for its defensive system changes to be distributed across the internet, it said.”]
Source: https://nakedsecurity.sophos.com/2014/03/05/meetup-com-ddosed-by-extortionist-refuse-to-pay-ransom/