@Mountford D

You send a hundred thousand emails a day. One in a thousand people are dumb enough to buy (this is reasonable; you probably have known far fewer than a thousand people - now think about the dumbest person you ever met). Your average sale is, say, $60, with a profit margin probably over $40. So say $40 on each sale.

You're profiting $4,000 per day. A hundred and twenty grand a month. If you send 200k emails a day - well, do the math.

And you can do this with almost zero effort.

That's why spammers spam.