That sucks, some people will get legit panic attacks and worse over this, especially for the smaller, more believable numbers in the 50k-500k range.
Hope they recover and sue for medical bill costs, emotional damage etc.
And like one reddit user suggests, everyone affected should write to their representative about hard billing caps protections
If someone gets access to your account they can just buy a 3-year reserved instance u7in-24tb.224xlarge and it will add almost $2m to your bill.
How about $5,544,640,717,404.09?
That was in my inbox this morning lmao