This is the first I've heard of these critiques from him, and as someone who loves open source/Linux, and belives it makes the world better in many ways, I think they're pretty valid. The model has major issues in at least two distinct ways:

1. Not paying for the labor corporations exploit. GPL is better here, but still imperfect. MIT/BSD is awful here. It wouldn't matter in an ideal post-scarcity society, but we don't live in that yet, so it does matter. Until post-scarcity, a better model would route revenue from exploitative capitalist uses back to the creators and/or their desired sinks.

2. The open source bait-and-switch - startups using open source to get users and then pulling up the ladder and going closed source and monopolistic once they have achieved scale to enforce/ achieve lock in.