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Thats why I said proof of work that is used to mine a cryptocurrency to pay the bills of websites that serve information.

As long as the website gets paid more than the cost of serving the pages, it does not matter if a human or a bot did the POW.

Securing signup forms is another issue. Maybe related. But not what I was referring to.

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Very good point, I missed the point that the PoW is paying the publisher. I will have to dig into this, this is a pretty nice idea.
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Residential proxy users don't get to run computation on the proxies.
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