from Hawaii.com email:
15% off Hyatt Place Waikiki:
HAWAII
This offer expires on 12/31/2016 and is not combinable with any other offers. Booking window is two weeks after 8/2/2016. Travel starting September through March 2017. Restrictions may apply. Reservations made with this special offer are non-refundable.
I don't even know what to think about that conflict in the terms - expires 12/31, but booking window is 8/2-8/16?
And I don't know a thing about Hyatt, one of the handful of programs I have never been inspired to join. As always, YMMV... and happy and safe travels to you all.