Spam is bad because no intelligent person would believe it works. What
you mainly see are gullible idiots who have got a hold of some mass
e-mail tool. Such people are genetically incapable of writing ad copy.
In their hot rush to strike it rich, most won't even bother to spell
check their work.
I see only two ways to make money with spam: get and sell e-mail lists
to morons with the easy money mentality, or push porn.
No credible marketing organization would ever rely on unsolicited
e-mail to sell their goods. Thus, no good spam.