Well I just tried it on the mobile site(I have a Samsung phone) and I saw under SORT & FILTER there was a box for "Hotel Availability". However when I unchecked it, it doesn't list any hotels for me at all. It's not listing anything. I tried 5 times and it doesn't work. I also tried it in my app and there is no option to see ALL available hotels. So not sure why it works for you on mobile BRflyer, it certainly doesn't work for me.

I also should have clarified, I first tried this on my pc tonight and like I mentioned, it doesn't allow me to see all the hotels anymore.

To me it looks like Marriott is eliminating this option which is terrible imo. Mobile website is the only 1 left that has the ability to uncheck the box but like I just said, it doesn't list any hotels when I uncheck it - it just is pretty much a blank page. So that leads me to believe that Marriott thinks it's good to get rid of this feature. It's a shame.