F5 isn't the most visible corporation in terms of grassroots engagement, but NGINX itself has remained F/OSS all these years and newer projects like the Kubernetes Ingress Controller [0], Gateway Fabric [1], and NGINX Agent [2] are all Apache 2.0 licensed. Just like Unit.
We do have commercial offerings, including the aforementioned NGINX Plus, but I think we've got a decent track record of keeping useful things open.
I have trauma from Aerospike, Redis, and couple of others, so it may have affected my perception.