Luckily for some, AWS's public SLAs have an "SLA Exclusions" section that says you can get lost in case of force majeure! I guess they can skip the refunds and everyone can proceed straight to the lawsuits.
https://aws.amazon.com/s3/sla/
https://aws.amazon.com/compute/sla/
I wonder what local laws say or what kinda contracts their large/government clients get.