What you say is true of Paris, Aman hotels, some Four Seasons properties, African safaris, most of the Maldives, and a handful of other places and hotel operators.
It's not true of many others, some of which are surprising: Mauritius, Vienna, much of Asia (esp Japan and Thailand), much of South America, most of India, a lot of Italy, and even French Polynesia.
Then again, it's a 5-star hotel, so service will generally be good (and that is worth something in my view).
Alcohol is also factor in some way with many decisions - it probably doesn't come as a surprise to non-drinkers just how expensive a weekly habit can get. It also helps to be able to work on spreadsheets and compound interest calculations whilst staying strictly sober. ;)
Overall in the end, it's still the same old phenomenon; advertising, but carried through a newer medium. TV infomercials, print ads and telemarketing used to be big, but that's passé now.
Perhaps what I find more interesting about the OP is how there are still so many businesses with informal processes when it comes to promotion - even something as a simple as an up-to-date Google Maps listing can sometimes go neglected.
Which is why this stuff works for premium mediocre products. Stuff that is more expensive, but still within the reach of the middle class.
But their followers cannot afford 1000 dollar a night hotels. So if I was a luxury hotel, I'd tell them to fuck off.
But if I was a cupcake shop, I'd let each of these influencers eat whatever they wanted for free.