On Proxmox free software
Insights and guides
The site has now turned out to live on as a stash of notes and observations, some of which you might find useful:
No-subscription setup tool for Proxmox VE/BS/MG
No more post-install chores. Sets up no-subscription repositories, removes the marketing-laden warnings as well as the pesky “No valid subscription” notice, also dubbed as a nag. Enjoy the freedom of free software.
Proxmox and free software
These pages once started with a single snippet post on NO subscription notice removal in a reaction to censorship of the official channels. This was despite the supposedly free license having been chosen for the product itself - Proxmox VE can be legitimately obtained by any user under the AGPL license - a choice Proxmox have made themselves.
As for the other meaning of “free”, please consider that as a non-commercial user, you already support Proxmox by running off the no-subscription repository, a pre-production environment where any bugs you help identify early offload their own Quality Assurance workload. This way, you also help Proxmox keep their suite free of charge.