I liked the SFConservancy's take on this move. Red Hat has always skirted the line of GPL compliance with the way they offer their support, and while the latest move may still be legally compliant, it's another signal that shows their dedication to open-source isn't as strong as it once was.

With this release, drone is now apache-licensed. From what I've been able to find, the developers have been active in other discussions but avoided the topic of why they went open-source when drone wasn't.

A few developers that forked Drone into Woodpecker CI when it stopped being open-source are anticipating another "rug-pull" in a few years with Gitness. I'm a bit skeptical myself, but Harness does have other open-source projects and Drone's decision to stop being open-source predates their acquisition.