Wasabi is likely even cheaper at $6 a month for 1000 GB (minimum) [0] and free egress to go with it (similar plans from Backblaze too [1]).

Scaleway is pretty impressive with its pricing too with 75 GB (storage + egress) free per month [2]

[0] https://wasabi.com/cloud-storage-pricing/#three-info

[1] https://www.backblaze.com/b2/cloud-storage-pricing.html

[2] https://www.scaleway.com/en/object-storage/