The company posting this recently managed to save $1,000,000 annually on their AWS bill.
Having confusing billing makes it harder to spot that you're paying too much.
It is the same reason Dropbox doesn't include anything in the web interface to find large files.
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Edit: tossing in some options to accomplish this; not really related to the current discussion:
Space usage analyser for Dropbox? | https://webapps.stackexchange.com/questions/47440/space-usag...
Unclouded - Cloud Manager | https://play.google.com/store/apps/details?id=com.cgollner.u...
The company posting this recently managed to save $1,000,000 annually on their AWS bill.
Having confusing billing makes it harder to spot that you're paying too much.