You may want to take a look at the "additional taxes & fees" that Rocketmiles adds to their hotel bookings. A recent booking through them showed almost 23% in taxes & fees while the same booking direct from the hotel only added 10.5%, which is the proper state & hotel tax for that region. When questioned, their reply was they did not disclose the breakdown of the additional taxes & fees, and that I should be happy with all of the additional airmiles earned by booking through them.