I didn't know about that, thank you, and yes exactly. The difference between normal use and spam is so marked that any system of charges could be set such that

I didn't know about that, thank you, and yes exactly. The difference between normal use and spam is so marked that any system of charges could be set such that no normal user was ever even aware of them. And to be clear I'm not talking 'normal' as in 'median' I'm talking 'human using their thumbs'. Even if you spend all day every day hunting down craigslist bargains and coordinating swaps