I pay for it and use it. For the record, I have a 100 percent success rate getting into Amex centurion lounges on nonrev passes and I have been to LGA, LAS, SEA, and DFW. I have also seen a delta guy in the Seattle lounge with his tie off and a north face jacket over his shirt. It's all about saying please. You pay the 450 a year for crying out loud.
You can also use the $200 airline credit to buy gift cards for the airline of your choice. See the flyertalk forum for details.