I just received a spam about spam ("Isn't it ironic? Don't you think?") For just $1,250 USD, they claim to be able to send your advertisement to 27,850,000 people. Now, let's assume they will do that, in exchange for your money, and that $1,250 USD is the final cost. That works out to a cost per recipient of .000045 cents! A pretty cheap investment. Now, assuming 1/10 of 1% response rate (people actually buying your product), you're going to get 27,850 responses. That equates to an advertising cost of 4.5 cents per buyer. Still a bargain! Anyone making 60% to 250% profit margin should be quite happy with their investment in spam marketing.