It seems that the 140x lower storage cost comes from:
1. S3 (OO) vs EBS (ES): about 5x
2. No indexing: About 10x ?
3. No data duplication (due to using S3 I assume) in HA deployment: 3x
Is my math right? Or do you use something different for compression?
2 Orders of magnitude of storage saving is pretty impressive.
Hope it helps someone!