If you’ve ever bought a movie ticket online at Fandango or Movietickets.com and then been offered a $10 rebate, you might well have seen a Webloyalty offer. The problem—as scads of consumers alleged to Xconomy, the Connecticut Better Business Bureau, the New York Times, and other organizations—was that by accepting such rebate offers, many people unwittingly signed up for discount programs that carry a $10 monthly subscription price, fees that customers often didn’t notice on their credit card bills until months or....