The point, whether you guys are all shilling for online casinos or not is that they had a flaw in their system that they had been made aware of and didn't care to update the security.
That makes them liable!
Also, it should not be possible to donate such huge amounts as it is in breach of the applicable AML laws!
However, based on my experience they ignore if they are at fault!
Did you contact
complaints@stake.com?