[AdrienPoupa]

Wasabi [1] is admittedly up to 80% cheaper than S3. But it forces you to keep your files for 90 days at least. I saw it recommended several times as a cheaper alternative to S3-backed storage for OwnCloud.

[1] https://wasabi.com/

[kondro]

Wasabi's policy prevents reading more than you write. They're designed for backup, not publication.