As scubadu noted, what immediately struck me is that caveat that the subscribers must have paid off their contracts first. It immediately affects those who are beyond the term of their contract and have not re-upped. If you're still under contract or enter into an agreement after today, they don't have to do anything until the contract ends if they don't want to.
Carriers, upon request, will unlock mobile wireless devices or provide the necessary information to unlock their devices for their customers and former customers in good standing and individual owners of eligible devices after the fulfillment of the applicable postpaid service contract, device financing plan, or payment of applicable early termination fee.
Thread title makes it seem as if they must do it for everyone, so it is a bit misleading.