Crazy idea comebacks

Over 15 years ago I came up with a crazy idea how to solve, “un-solveable”, problem of spam at a time. I came up with an idea of charging real money for real e-mails, which – of course was ridiculed. Interestingly enough the idea came back with Zuckerberg charging for each inbound message sent to his Facebook account. In addition to that other social network: LinkedIn made a whole business out of charging for sending messages in order to confirm their genuine intent and protect reputation of the whole system.