Then I know in Greece the booking.com commission is about 20%.... which is a lot! In Argentina it was (5 years ago) much lower due to availability of several other platform, so yes being the only provider is not a good thing
Btw I love booking.com: I still remember the scams in Venice until the internet popped up with reviews, and I really appreciate platform that helps who works very good: I met owners that told me: "yes, it costs, but I get customers as soon as I provide a great service"
I dislike airbnb as other have written: poor customers service when you tell them a host try to scam.
But like the Covid vaccine purchase fiasco, EU regulators will just sit idle cozying up to big business instead of standing for the interests of their citizens.
The fact that a project like the OP even exists is screaming proof of what I’m saying: if booking.com wasn’t indeed operating as a monopoly, wouldn’t the “free market” drive out the use of Booking’s notorious stress / bullying sales practices?