Azul sells their own high-performance Java runtime (Zing). Taking a guess here, they probably realized there's demand among their customer base for plain OpenJ

Azul sells their own high-performance Java runtime (Zing). Taking a guess here, they probably realized there's demand among their customer base for plain OpenJDK builds with cheaper and/or more reasonable support offerings compared to Oracle's. And once you need to deliver those builds, it doesn't cost too much to let just anyone use them.