Yes you could which would reduce the price for AWS storage (highest priced tier is $.03/GB for S3 and $.01/GB for glacier). I mention in another comment the co

Yes you could which would reduce the price for AWS storage (highest priced tier is $.03/GB for S3 and $.01/GB for glacier). I mention in another comment the cost of bandwidth. To play devils advocate... I assume (and hope) that when you need to restore a droplet from a backup that it a LOT more seamless and streamlined than trying to restore from AWS S3 or Glacier.