What they possibly could do? All systems are offline, what do you want? A personal receipt?

 My opinion, that there's no point for Kraken to quit, especially now. They earn nearly million (or more) $ per day solely from the trade fees. It is a solid business they make there.

 What they are doing - I think - is upgrading their buggy trading engine for ALL OF US - while in the same time  sacrifising their own profit - being offline for two days costs no less than 2 mils...

 I also have money there - but somehow I believe in their spirit...

 And also the time is right - the fluctuations in market these two days are minimal. Couldn't be a better time frame to perform this upgrade.