Verizon and AT&T get a short-lived net neutrality warning

Pablo Martinez Monsivais / AP

The Federal Communications Commission just dropped a report on a practice — known among wonks as "zero-rating" — where internet providers give customers free data for using certain websites or services.

This makes for great marketing copy. But consumer groups say the practice lets providers steer customers towards services the provider owns, violating rules the FCC approved to protect net neutrality.