As the founder of OpenFaaS, the author doesn't know how true this rings - given all the myriad enterprise users of the community edition/OSS code. Even with smaller projects like K3sup, where I've seen defence contractors have k3sup references in their codebases and issue comments, go on to ask for changes, yet publicly stating they've never used it.
We did pivot the business model in ~ 2019 to open core, and I've tried to apply that to future endeavours like inlets, with the latest "actuated" - self-hosted CI in microVMs - it's a SaaS, with no open source components.
The common retort from users is "when we're in production, we'll pay for support / sponsor the project" - this literally never happens.
I applaud the author for laying it out how it is - there is no business relationship, open source maintainers are not suppliers, but if you want us to become your suppliers, have procurement reach out. Because we may well be able to offer you a relationship that would be mutually beneficial.