Let's just say that Instapaper's outage was self-inflicted. You don't see them blaming their cloud provider, do you? People make mistakes, and even with a managed relational database service, you can still make mistakes.

The difference is that Instapaper was able to restore from backups, because their managed service performed them properly. The archive data is taking longer to restore, but that's due to design decisions Instapaper made.