I think the licence is only valid for the most recent version of Java (I can't remember whether it applies to the JDK only or to the JRE as well), which forces users either to keep on upgrading the Java version (not easily possible for 3rd party software) or to pay up.
We went through a mad rush of replacing Sun/Oracle Java with Amazon Corretto a few years back at a very large organisation when it became clear that Oracle won't let us off the hook easily. Most old applications that could not be upgraded to Corretto were promptly culled.
