For example terraform changed their license to a non open-source license, and everyone hated it. Then a fork was created, which used the code before the license change which was still licensed under an open source license. The fork "OpenTOFU" is now 'owned' by the Linux Foundation
https://opentofu.org/blog/opentofu-announces-fork-of-terraform/
Same for redis, there is also a fork called Valkey now, which is also 'owned' by the Linux Foundation:
https://redis.io/blog/redis-adopts-dual-source-available-licensing/