Today I was in a Mobil gas station.  They have big signs advertising their deal with Upromise, a company which helps you save for your kid's college expenses.  Nothing wrong with that, right?

Well, let's do a little math.  If you sign up with Upromise, Mobil will pay 1¢ for each gallon of gas you buy into a college savings account.  I drive about 10,000 miles per year, and my car gets about 25mpg.  That means I buy about 400 gallons of gas per year.  That means Mobil would pay 400¢ per year.  Wow, $4, that's really going to help send my kids to college!

This program must cost Mobil a fortune, because they are advertising it everywhere.  No doubt there is positive PR value to the message "we're helping you save for your kids' college", but don't people do the math?