According to SC Magazine spammers command six figure salaries working from home.

Obviously, there's a big difference between "reputable affiliates" and "spammers." The article discusses affiliates that well... spam, spam, spam!

“If sellers are running a website that is selling cheap drugs, rather than doing all the spamming themselves, they contract out to affiliates,” Richard Wang, manager of SophosLabs U.S., told SCMagazineUS.com on Monday. “Affiliates get paid according to the amount of traffic they send, or collect a commission based on how much is sold.”
Of course, in some cases, the goods being sold are fraudulent or orders are never really fulfilled. In other cases, there will be something delivered, possibly fake, but the affiliates are paid regardless, he said.
Don't think of changing your day job...