Welcome to the PBS Pro community!
Just to add to what @mkaro said, many private organizations also have a strong preference for commercially-licensed software with commercial terms. Some even require commercial licenses, both to get indemnification, and to avoid any potentially anti-commercial terms of an Open Source license. You'll have to check with your legal team in particular to see if they have any such preferences.
Really, this is a big reason why Altair dual-licenses PBS Pro -- to cater to organizations (mostly public) who want Open Source, and to also cater to organizations (mostly private) who prefer commercially-licensed software. The idea is to allow innovations to be shared among the whole HPC world (public & private).
Please let the community know how it goes!