The only time I visit Las Vegas is for corporate conferences. Typically 2x - 3x a year. When I travel for those, I can either book hotel through the conference registration site, or I could choose to book through my corporate travel agency (American Express). Am I going to gain anything with Marriott out of this? All I care about is points and night credits. Those have always been available when booking through either of the above channels (in other cities, at Marriott-brand properties, where I have attended conferences). I really don't care about any of the other "resort benefits" cited as I would be unlikely to take advantage of any. But the nights are important for me to retain Titanium.