LOS ANGELES— A new ad appearing in dozens of magazines and newspapers shamelessly preys on people with "ideas." "Turn your idea into $$$!" read the 1/16th-page ad, which ran this week in the classifieds section of Parade and Rolling Stone. "Learn how top inventors get their ideas off the page and into the marketplace!" It remains to be seen how the nation's idea-having demographic will respond to the unnamed advertiser's attempt to charge a fee per idea submission, successful or not.