We were hit by a strong layer 7 DDoS attack, targeting our infrastructure. Some of our servers went down, causing disruptions on our platforms. We have investigated the attack, and updated our mitigation systems to handle these types of attacks better. We will be adding more advanced security rules to our whole platform in the coming hours to defend against these attacks further. All our systems are redundant (set-up double or even triple) but they could not cope with this attack. We will do our best to keep our infrastructure online at all times, sorry for the inconvenience.