Sure it does. You have a single entity who's able to compete in ways that nobody else can. If I write a significant body of work based on Qt then my choices are either (a) sign the CLA, giving Digia a significant competitive advantage over me when it comes to selling my code to other companies who want to ship proprietary forks of Qt, or (b) not signing the CLA, ensuring that most of the ecosystem never gets to use it. In the absence of any incentive to pick (a), the ecosystem suffers.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds