The spammers must post funds, in advance, to a database and each email they send must have a click link to "claim" and deposit the 10cents to the addressee, if they do not want the Spam message.
Once your account reaches $x, you can get the money transferred to your checking account, or a charity of your choice.
This might only work in the US...
Any thoughts?
Many times MailWasher encounters a piece of junk mail with a spoofed (phony) return address and it can't notify the spammer so the spammer just keeps spamming away.