It would be fair in general to disallow charging a one-time fee for something that's shut down soon later. I don't expect perpetual support, but there should be

It would be fair in general to disallow charging a one-time fee for something that's shut down soon later. I don't expect perpetual support, but there should be some target based on the price that any well-intended software maker will exceed. Also if you advertise "lifetime license," that should mean lifetime.