I travel solo and I can easily afford $15, I might even pay iy, it depends on how it goes. But it's not the point.Sorry to disappoint you, but I am on board and will be buying it. Like most tools, I will not likely buy it every day. I will buy it intelligently based on my park and planning. Certainly I will buy LL for things like SDD if it's available. I am looking forward to that aspect of the system. I am sure I am not the only person.
It will work only if adoption rate is "average". If everyone buy it, depending on how much capacity will be allocated to g+, either everyone will wait in the LL lane instead of the standby line or you'd be able to get one or two before they're all gone. You'd pay $15 for nothing. So Disney will increase the price lo lower adoption to a level it'll be benficial.
You see: it's not a service to improve your experience, it's a way to lower everyone's experience to the point enough people are disperate enough to pay to fix the problem Disney created.
That's what I find disgusting.