Receiving the first spam comment after 7 days of operation I wondered about the global cost of spam once again. While google will provide a range of high random numbers (with a maximum of $200 billion per year) there’s also this little form that will allow you to compute your individual costs per spam. And by wasting the time to fill out the form you can increase your costs even further!
Unfortunately the form doesn’t cover spam filter tuning nor comment spam so it was not that much of a help after all.