Yea I think stuff like this is great and will have some impact around the edges. Perhaps particularly in the realm of end-user software, like a window tiling manager.
But once we start talking about the kind of software large corporations (like AWS) will have an interest in, projects have to be successful to be useful. Software requires maintenance so the maintainers need to be able to devote their time to maintaining and improving the project. So this will select for projects that are successful enough that the maintainers can focus on it fully (either because some company hires them to work on their own project, they can charge high consulting fees because of their association with the project, or whatever).
I think "the code" (the thing covered by copyright) in most cases is not as valuable as "the project:" the leadership, the contributors, the users, the norms and practices, the commitment to ongoing maintenance, and so on. So just lots of individuals all putting pieces of their code out there with GPL probably doesn't make a lot of impact (though there is nothing wrong with it), because most users don't want "code" they want a "project" they can rely on.