In short, you can try to charge people (or bots) per page but it's not like you'll ever see that money, as it breaks a fundamental paradigm of the internet.
That is a really good idea, in fact I’m doing something similar. I am charging anyone reading this comment 100 bucks per letter read, please tell me who I should send the bill to.
How does that work? I'm not a laywer, but I can invoice you $1 and the T.o.S of reading what I have to say are licensed under a $1 per view licence and by continued reading you consent to the terms of this license. Where can I send the bill for this comment?