Reading through the points from the page you posted - I think internally only actions related to that were basically to add more info (e.g. popup/hover or just "on our site") to clarify to people that same as every other marketplace on the Internet ... coughAmazoncough ...
Things we show are just things we know about and have in our "inventory".
And actually after some of those changes - I believe some customers started to complain that reminding them how "X other people are looking at {name of hotel} for your dates" felt much creepier than "X other people are looking at {name of hotel}" ¯\_(ツ)_/¯
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PS. Only reason I wrote a quoted "inventory" is that unlike physical goods with real stock. When you're renting accommodation - on top of physical rooms, there's extra dimensions due to different dates, meals (because in many hotels restaurant can't support everyone having breakfast, half/full board/meals) ...etc.