However, what are the alternatives? Linode have been dead stable for me the past many years, and delivers what they promise in a transparent way. No overselling of servers. No sudden extra bills.
Linode will come out stronger after this, so it won't be able to happen on this scale again.
The big question is: Who, with a lot of money, would want to hurt Linode's business in this way? This isn't just a "script kiddie" having fun. It's a very well planned and powerful attack requiring buying large botnet capacity for an extensive amount of time.