A redemption fee is a good idea, but it would still take engineering effort to build such a feature, so the opportunity cost is that other features customers ne

A redemption fee is a good idea, but it would still take engineering effort to build such a feature, so the opportunity cost is that other features customers need wouldn't get built. Another thing I'd like to point out is that you really need to plan for ephemeral storage to fail. All it takes is a single disk drive failure in your physical host, and you've lost data. If you are using ephemeral storage at all, you should definitely have good, reliable backups, or the data should be protected in other ways (like HDFS replication).