I second what Erik and Ville said.
I would be happy for ABCL to be used in a commercial project, and I would not be personally against releasing a version of ABCL, including my contributions, under a commercial license (whose profits could go towards improving ABCL). But relicensing it under a permissive license, just so that some business can make money from it for free without any form of compensation, would be unfair in my opinion. I mean, Oracle itself applies the very same licensing scheme to Java and the JVM: GPL with classpath exception for OpenJDK, and a commercial license for Oracle JDK.
Cheers,
Alessio