Enterprises are (slower than I’d hoped) learning the value of contributing to the open source projects they use. More companies are establishing Open Source Program Offices and I expect the rate of contribution to go up. Most contribution from companies will go to software licensed under MIT/BSD/Apache.
US government policy is that software developed with public funding is a public good. Current policy encourages government software to released under the most permissive license possible (ideally Public Domain, but practically permissive licenses like MIT/BSD). GPL is farther from the Public Domain than licenses like MIT/BSD. To enter the rabbit hole of material on this topic start at https://code.gov/about/overview/introduction/.