For $200 you can buy non-DIA signup free nights.
Personally I wouldn't trade staying in a PH for DIA bennies.
There's a PH in DXB, CDG, MEL. The GH HKG isn't a highly regarded hotel, there are several better non-Hyat options there.
So like I said, you've got the PH YYZ and the PH ICN where it just may make sense.