What other $0.10 cent items can you give away free to get people to submit your spam info (including your house address).
Let's see... a free dime by mail! Or something else that people would think is WORTH MORE THAN A DIME, but really isn't?
Why would you give away your info, which is clearly going on as many mailing lists as they can sell it ot, for a $0.10 cent item!