Basic features like turning a bulb on with a set brightness or color (if you’re lucky, you can turn on with a set brightness). No support for scenes (due to matter spec) which can lead to issues sending commands to light groups. And if you want to actually update bulbs good luck because it’s buggy as hell.
YouTube already does that, though? In fact your premium sub helps creators much more than a non-premium viewer does. Of course the multiplier proposition would be new/different.
Not trying to shill for YouTube but that’s one of the main reasons I have a subscription is to support creators I like.