choosing the right subscription plan

Hi all, some months ago I have installed a proxmox 6 on a 3 nodes cluster using the default kernel (I didn't buy any subscription plan). Now I would like to upgrade my nodes to proxmox 7 and at the same time buy a subscription plan and I would like to choose the right one. On the Standard plan I see that is included remote support via ssh. But what does it means? Means that I can open a ticket (for example "I would like to upgrade my cluster to proxmox VE 7") and they do the job via ssh or...

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