I really couldn't care less about a company relicensing code to a proprietary license. But the disturbing bit about Commons Clause is that it tries hard to muddy the waters between OSI/FSF compliant FOSS licenses and proprietary licenses. Even saying Apache + Commons Clause is in important respects misleading because there's no addition of rights. Traditionally LicenseA + LicenseB is used for dual licensing, which gives you more options and LicenseA + Exception is used for extra rights relative to license A (e.g. GPL + classpath exception). The Commons Clause however subtracts from the rights given to the effect that the license granted is _not_ the announced license but a butchered version of it.