It looks like they are operating through Airport Dimensions, who runs "The Club." IMO those are sub par compared to the Admirals Club, which I consider also inferior to the Centurion Lounge, so out the gate I am not seeing a huge competitive advantage to the AMEX Plat. Plus AMEX has a leg up in terms of footprint, but Airport Dimensions has 28 lounges, some with multiple locations in the same airport (i.e. DFW, MCO, etc) so we'll have to see if some turn into Sapphire lounges.