I think one could argue that this is just scummy behaviour. Bitblender has been online for years, you really think a couple days will make a difference?
He's storing god knows how many user funds on his website, why is everyone so hellbent to give him a pass regarding this?
This just looks to me like he's trying to exit scam and run off with the funds of his customers... under the guise of "paranoia"...?
He gave people a couple days to withdraw, and then brought the servers online
again a day or so later so the laggards could get their coins. For an exit scam, that's
extremely generous.
We don't know how his site was set up. Maybe he is right to be paranoid.
At the end of the day, there are good reasons why we always tell people not to store coins with third parties. That risk is especially true with services that may be targeted by governments.