Some images on Azure are 'supported' via a 'plan' (see for example https://docs.microsoft.com/en-us/azure/virtual-machines/windows/cli-ps-findimage).
A problem with this is that any subsequent images or VMs you create from the original VM also carry the same plan options: E.g.
az vm create \ --location "westeurope" \ --resource-group blah \ --name myvm \ --plan-name centos-8-0 --plan-product centos-8-8 --plan-publisher skylarkcloud \ --attach-os-disk copyofacopyofacopy \ --os-type linux
Is there a way to remove the plan?
It is also not easy to manipulate such images as the portal does not support plans directly (see for example Azure - Move/Restore a VM from a backup - what is a plan?)
As an example, I have been given a VM based on CentOS 8 image originated by Skylarkcloud. Aside from uploading a CentOS 8 image I recieve no value from the fact that it is a skylarkcloud image rather than an untainted CentOS 8 image. In fact it has if anything had a negative effect to having to navigate around the
This is emphatically not a matter of trying to get around paying for legitimate work.
Paying for commercial support if required is one of the key differences between CentOS and RedHat variants. It makes no sense to pay for a free version (CentOS) of a non-free/commerically supported version (RedHat) of a free OS (Linux). A one of fee for distribution media is arguably fair. It makes no sense to pay ongoing fees for any future copies made by the originator or anyone given a copy.
I guess the idea is that the distribution cost (which is virtually zero for digital media) is amortised over the lifetime of the VM. But what about all future derived VMs?
See for example: