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A comment on Man makes money from cold calls with his own higher-rate phone number (2013).

Re:Man makes money from cold calls with his own higher-rate ... by pfriend on Saturday March 30, 2019 @10:59PM (#19533503)
It's called proof of work.

I did this for email. Get in touch if you want to try it.

I'm now working on doing this for the browser.

[ Parent | on HN ]
Re:Man makes money from cold calls with his own higher-rate ... by msla on Sunday March 31, 2019 @01:20AM (#19534034)
> It's called proof of work.

> I did this for email. Get in touch if you want to try it.

How? Via email?

I'm not going to implement your proof-of-work scheme just to email you.

Nobody else is, either.

[ Parent | on HN ]