There's a lot of truth in Nietzsche's statement, "That which does not kill me makes me stronger."
You're comparing Amazon.com with Magic The Gathering Online eXchange.
One of them is the biggest success of the internet age that employs the most talented computer scientists in the world to tackle the most difficult business and technical challenges on the internet.
The other is a glorified calculator, providing a service that was already perfected long ago, in a very amateur and incompetent way. They've made errors that freshman computer science students know not to make. They've proven their deep incompetence.
AWS went down because AWS is like the space shuttle of internet technology. It is cutting edge: AWS EBS is trying to solve a problem that most other experts literally consider impossible. Despite their downtime, they haven't even violated their SLA.
Magic The Gather Online eXchange is too incompetent to use bcrypt and not expose their fucking accounts database to insecure parties. Magic The Gathering doesn't even have an SLA. Because they are fucking incompetent and untrustworthy.
AWS did violate their SLA and did in fact compensate customers like me in the wake of their outage. I expect that Mt. Gox will also do right by their customers, including formalizing some sort of guarantee if necessary, although I wasn't aware that commodity exchanges had SLAs.
Meanwhile, although you're right that AWS and Mt. Gox aren't really comparable in terms of current scale, my point was not about scale, but about adaptability.
And besides, Amazon started out as just an online bookstore. It will be interesting to see where Mt. Gox is 5 or 10 years from now. You think they'll be dead. I'll wait and see.
Early days yet, people. Growing pains are expected.