EDIT: In fact corporates are ready to pay to fight spam! Google bought postini and paid for it! But I am sure that some hackers will be interested in fighting

EDIT: In fact corporates are ready to pay to fight spam! Google bought postini and paid for it! But I am sure that some hackers will be interested in fighting it and making a smarter spam filters, just the same as some hackers here discuss the issue here, and they won't get any money!