A DDOS (Designated Denial of Service) Attack is a technique used by criminals to disrupt or crash websites. It works by sending millions of page requests to a website (just like when you hit F5 to refresh a webpage), until it eventually crashes. You may have seen over Christmas the Sony Playstation and Microsoft Xbox platforms were attacked by a similar group, who demanded Bitcoin payment before they would restore the service.
Is my money safe?
Absolutely yes. All client funds are ring-fenced and are as secure as can be.
Could it happen again?
Yes. It would be irresponsible for Betfair to claim that we won't ever be attacked again, however rest-assured that site uptime and stability continues to be our top priority and we'll continue to invest in systems that protect us from criminal activity.