Indeed MinIO is powered by kubernetes, MinIO delivers scalable, secure, S3 compatible object storage to every public cloud. And in a way it’s logical, that NS8 needs such tools.
AFAIK AWS S3 protocol is not open source. Nobody, except amazon, knows anything, It’s all reverse engineering. You don’t see any risks, do you? If I’m wrong, please correct.
For sure until now it is not widespread among SME admins/users. I will not use this for backups.