See, I'd probably assume that the hotel's own site has the information right and it's Booking.com's information that's wrong--which may or may not be correct. :

See, I'd probably assume that the hotel's own site has the information right and it's Booking.com's information that's wrong--which may or may not be correct. :) Either way, though, I wouldn't assume that people who book on Booking.com get free wifi and people who book on the Marriott site have to pay; it's much more likely that one or the other site is incorrect: either the wifi is free or it isn't. (Or like Hilton, it's always free if you're a member of their rewards program.) As for reviews, maybe? Hotels have to care in (ahem) aggregate, sure, and it's probably true that more people see reviews on travel sites than on Yelp or Foursquare (although it's sometimes interesting to compare). But if you're a hotel loyalty program member, then they have incentive to make you want to think well of their hotel brand. Anecdotally, I've never gotten bad service from booking from Hotels.com; it's not like the hotel staff goes out of their way to be difficult or anything. But I've noticed that I'm more likely to get a room right by the elevator when I book with them, while I've noticed that booking as a Hilton Honors member seems to be fractionally more likely to get me a free upgrade, or a welcome note from the manager at a hotel that didn't give me one two years before when I booked on the third party site. All anecdotal, possibly coincidental? But still something I noticed.