This I agree with 100%. Just an option to buy it or even a package to buy all of the non included features. We should have the option to have all of the features available to us without being forced to give up out licenses.
I'm a lifetime license holder. I really don't see the issue to be honest. When we bought the license there was nothing that accessed their servers. IE spam monitoring, visual editor, etc... While it would certainly be nice to have these features, there's really no way we could expect them to offer us services that require their servers.
So far we haven't been blocked from or asked to pay for anything that is necessary to run the latest software. Just MO.
I am selling both virtual and physical products. IE, since subscriptions is now combined, I sell support packages and I sell physical goods I have to ship. Anyhow I need the option to have a minimum order on physical goods, but not on virtual goods. example, to ship I need people to buy at least $10, however my lowest priced support package is a $1.00 monthly subscription.