[brongondwana]

The $10 level is very much "entry level". The $20 level is enough for a lot of people. It's surprising how many people still delete most of their email from the server.

You're also paying for multiple replica copies and backups and all that good stuff. By the time you add RAID, search, metadata, etc - there's pretty much a 10:1 ratio between quota usage figures and raw disk used.

Then there's development effort - we're not just installing a couple of packages and then sitting back and letting them run.