I'm not entirely sure how their commercial offering works. It looks like it's a commercial fork of MinIO, but I wasn't able to find anything about assigning cop

I'm not entirely sure how their commercial offering works. It looks like it's a commercial fork of MinIO, but I wasn't able to find anything about assigning copyright for pull requests in their Github. (I didn't look that hard). But, if the main product is 100% F/OSS AGPL, how are they accepting code from outside contributors and still maintaining a private enterprise offering under (presumably) a different license?