I'd argue the opposite. xGPL makes it easier for the founding company to just run away with it. We saw it with MongoDB, where it being AGPL means one company can control and unilaterally relicense it. Other examples I'd see of being GPLed doing little to nothing to prevent such shenanigans are any Oracle owned GPLed properties -- Java, MySQL, and VirtualBox all have user-hostile projects and misfeatures added even with the GPL. Conversely, permissive Free projects like LLVM and Postgres have had a lot harder time with one company controlling, because its non-copyleft nature means that everyone has a fair footing in controlling the direction.