I do exactly this: Write code/frameworks that are used in academic research, which is useful to industry. Once we publish an article, we publish our models open-source under the MIT license. That is because companies that want to use it can then embed our models into their proprietary software, with essentially no strings attached. This gives them an incentive to support our research in terms of collaborative projects, because they see that our research results in stuff they can use.
If we had used the GPL, our main collaborators would probably not have been interested.