Pharmaceutical spam can generate more than $4,000 per day in sales, confirming that spam continues to thrive because of those gullible few who click through and ruin it for the rest of us. And that's not just an estimate: a security researcher from Sophos have combed through sales logs as part of his investigation into the growth of spam networks, noting that Russian affiliate partner networks--also known as "partnerka"--are responsible for some of the largest Canadian pharmacy spam businesses.