subscription is the new big trend ... but if everything goes on subscription, people will start to think more carefully whether these "few" dollars a month are worth it as it will start adding up considerably ...
I don't see any point in any subscription unless I actively benefit (e.g. like I do from Cakewalk's monthly updates with fixes and features) ...
or put it differently: I won't subscribe to receive the same newspaper everyday, especially if I already paid for it ... so plugin vendors should think twice if they really want to go this road ...