In fact, the problem is that you have to buy a subscription, with all the implications in terms of loss of control, privacy, security, etc...
$5 on a $6299 camera is nothing, just pay for it, petty but not really infuriating. Even at $500 I would simply pay should I need it. If I had reasons to buy a $6299 camera, it probably means a budget in the tens of thousands, for lenses, lighting, accessories, etc... $500 is peanuts by comparison.
But I certainly wouldn't want my very expensive setup to fail just because some server is down.