"We are currently expericing a large scale DDOS attack that has hit our sites which started at approximately 6:00am EST Sunday. We are working with our data center to resolve and/or mitigate this issue. More information will be posted here as we get updates. For the time being customers can connect to AlertPay at an alternate location: https://18.104.22.168"
"We have finally mitigated the massive DDOS attack that started at 6:00am EST. Unfortunately it took almost all day to resolve. The site is operational now, and hopefully we'll continue to tweak it more tomorrow to ensure this doesn't happen again. We sincerely apologize for the inconvenience and we understand that this outage affects each of you personally. We’re sorry for that. We will continue to put measures in place so that outages like this do not occur again.
There are two possible explanations regarding who's behind the DDoS attack. It's either unethical competition which in times of international economic meltdown can easily restore its market position by damaging the reputation and reliability of known competitor, or cybercriminals in "revenge mode" against a particular online payment processor that has detected their fraudulent activity, thereby causing them huge monetary losses. Despite the fact that online payment gateways have always been targets for DDoS extortionists, with malicious attackers introducing new models like the DDoS for hire one, they have empowered literally everyone knowing how to contact them with the opportunity to forward the responsibility for an attack to a third-party. Here's a brief retrospective of DDoS attacks against online payment processors that took place during the last couple of years, with only a single instance of DDoS extortion :