Duplicity can backup to Backblaze's B2 service, which is an S3-alike where you only pay for storage and download, not upload. 40$ to restore backup in the case

Duplicity can backup to Backblaze's B2 service, which is an S3-alike where you only pay for storage and download, not upload. 40$ to restore backup in the case of a failed disk, and a few bucks a month (literally) for storage.