[hashcash] UCSD study shows 0.00001% spam conversion rates

  • From: "John Honan" <jhonan@xxxxxxxxx>
  • To: hashcash@xxxxxxxxxxxxx
  • Date: Tue, 11 Nov 2008 11:17:59 +0000

I thought this might be of interest to the group. If anything, it
shows that suggested response/conversion rates are much lower than
these discussed on this list a couple of years ago. It also uses a
very interesting quantitative method to obtain this data.

Link to BBC News article "Study shows how spammers cash in"


Snippet: "Spammers are turning a profit despite only getting one
response for every 12.5m e-mails they send, finds a study. By
hijacking a working spam network, US researchers have uncovered some
of the economics of being a junk mailer. The analysis suggests that
such a tiny response rate means a big spam operation can turn over
millions of pounds in profit every year. It also suggests that
spammers may be susceptible to attacks that make it more costly to
send junk mail."

Link to UCSD paper:


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