But actually, on Airbnb you can't see the review of the other person before both have submitted their review. That ensures that neither party retaliates.
Furthermore, guests and hosts submit a review a very high fraction of stays, and one cannot submit a review without actually hosting or actually spending substantial money as a guest, so AirBnN avoids most of the problems that Amazon reviews have.
I would host independently minded guests that don’t want/need hand-holding, and guests that are vetted for being socially respectful (tidy, no 3AM drunks, etcetera). My property is tobacco and alcohol free, which surprises friends, so I can imagine strangers being disrespectful.
Do trustroots.org or movingworlds.org provide filtering? I really never want to have to trawl through reviews, because I find it wasteful and also I think reveiwers tend to avoid writing anything truthfully negative (allusions and omissions might occur, but are not always obvious).
Which is weird, because of course the money comes from the guests.
I have seen the opposite dynamic when it was a buyer's market with real estate: the vendor is paying however the agent was actually helping the buyer (to the detriment of the vendor). Real estate agents make their money from volume of sales, to a first approximation.