Hi Michael,
I just answered this in the other thread you posted in. Here's what I wrote...
Being grandfathered into the Essentials subscription tier means you'll get it without having to pay for it. So if you have purchased a V5 Pro license, you won't have to pay for an Essentials subscription. If, however, you wanted access to the features in the Premium subscription, you would have to pay a monthly fee for them.
Michael