I know nothing of Progress. Are they OSS friendly? I'd hate to see some of the OSS chef-managed tools die on the vine because of this.
They might claim though - as in the link below - that this is because their products are too niche to support quality input from open source. Make of that what you will.
https://www.progress.com/tutorials/odbc/open-source-database
"We have a long history of supporting open source communities so I am proud to say that we will continue to nurture the vibrant and thriving Chef open source community."
Some of its products (e.g. Telerik Kendo, NativeScript) have open source versions. There's also Fiddler Network and JustAssembly/decompiler.