Comment on Sending newsletters should cost somethingComments−sneak4ySee also:https://en.wikipedia.org/wiki/Internet_Mail_2000https://en.wikipedia.org/wiki/Hashcash−qqii4yYes, this is a very old idea that resurfaced when javascript based crypto miners as an alternative to advertising became infamous.
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See also:
https://en.wikipedia.org/wiki/Internet_Mail_2000
https://en.wikipedia.org/wiki/Hashcash
Yes, this is a very old idea that resurfaced when javascript based crypto miners as an alternative to advertising became infamous.