I've found the option in the past (not that I was trying to accomplish it). As I recall, I was just on amextravel.com, searched for hotels in a city (not by name), didn't check "Show Fine Hotels and Hotels Collection First". I found the hotel in the options and it had a prepaid rate but then a button for "Fine Hotels".

Honestly it might have been like pewpew said, just that I wasn't logged in at the time. I usually pop into privacy mode for hotels and airfare searches.