Class A = 100% of retail cost
Class B = 75% of retail cost
Class C = 50% of retail cost
Class D = free
I'm convinced that the vast majority of those outraged by today's data collection practices will conveniently direct their ire to some other cause when faced with the possibility of actually having to pay for the services they've gotten used to having for free.
I have written more about this here https://news.ycombinator.com/item?id=16351892
Maybe this is how the whole web-based fee structure should have been setup in the first place but it's not the current deal we have in place. How difficult will it be to shift an entire industry (and consumer mindset) to a vastly different fee structure?
Since they do such a terrible job of it anyway I can't imagine it being less profitable.
And then again, maybe actually paying for something like facebook is the right way to go.
Because that would provide an easy way out of the whole sitation. Just make the price ridiculously high, and all users will choose the free, your-data-belongs-to-us version.