I first noticed the possibility for this July 2020, first witnessed it work Sept 2020, last witnessed June 2021 and BIL reported is still working 2 weeks ago. I'm posting now because I have enough data to answer most Q's, can confirm no effect on future offers and am that pissed off about the new service standards. This is an advanced hack. It only works for a specific group of players (without downside risk) but if you fit the mold savings have been $250+ at various times. All I ask is anyone responding avoid using company, hotel, management or slang names or any other words or phrases that will flag the social media sniffing algorithm for human eyes. We want to keep this flaw in place as long as possible. Short version, Rather then booking 5 nights comp in Sun out Fri in a room with a comp value of $129 per night instead he booked the general public paid rate of $69 for the same room type and back ended at checkout. Execution without downside risk is a bit more complicated. If there is any interest I will provide step by step instructions. Anyone else doing this?