When PA replaces the standard plates for free, are those replacements with the same number or with a new number? Because if it's with a new number, they can just grab whatever's on hand. If it's the same number, then I have no explanation other than "because they want money", as a new plate would need to be custom fabricated regardless.
Meanwhile in NY, all replacements require paying the full fee, even if the plate is unreadable to the point where you risk a ticket (there's an exception for plates suffering from a specific type of sheeting failure caused by a defect in the manufacturing process by 3M, but mine didn't qualify even though they peeled and faded early).