We developed a library for regex matching used in a lot of security products, and I was always blown away by how little support people seemed to want/need once it was open sourced. Support contracts? Follow-up? Feedback of any kind? "Nah, we're good".
As a corollary of this, companies that don't even acknowledge the open source that they use or provide feedback have only themselves to blame if the developers of those projects aren't recognized for their work. If you do OSS development at a BigCo, and no-one bothers to tell your management that they are using your stuff, it's pretty hard to make the claim that the development is still worth funding.