Copyleft free software licenses such as the GPL explicitly grant anyone the right to use the software for any purpose, as long as they also extend this right to their own software. The intent of this license was to infect any novel software built upon GPL-licensed software, forcing it to become free as well; in practice any organization who wants to build a proprietary app or service simply avoids GPL dependencies (or blatantly violates the license terms). Empirically, software companies care more about avoiding being forced to release the source code of their own proprietary software more than they care about using the exclusively-GPL'd software commons as a dependency, and this isn't a problem the license itself can solve.