Just when I thought I had seen it all. I get this email from American Airlines the other day since I am a too frequent flyer there:

"As a valued American Airlines® member, you are invited to earn valuable rewards, including AAdvantage miles, just for reading e-mail that is pre-screened to match your interests."

"Spend a few minutes reading and reacting to e-mail offers, pre-screened to be relevant to your business or family interests, and you’ll earn e-Rewards currency. Respond to brief confidential surveys from major companies who want to know what you think about products, services or marketing ideas and you’ll earn additional e-Rewards. "

There are alot of things I will do for miles (like flying) but reading spam is not one of them.