Opt out or co-registration registration:

This is where you register to win a new car, cruise etc. As part of that registration you agree to receive promotional materials from four or five merchants.

At one time I was part of an organization that sent out some 18 million e-mails a month. It was very successful compared to the other marketing methods that they had been using.

This method did achieve the same or better results for a lower cost.

I hated every minute of it; it was 100% brute force with no intelligence foresight or relationship building.

I'm not even sure that it's still legal, I don't care I'm never going to part of it again.