I just wrote a post on Airbnb reviews (www.stacker.news/items/579697/), and I thought I'd give a little update.
I just got a review request from my most recent AirBnB host:
Reviews have become essential in the online portals, so I ask you to rate my apartment with the full score, which of course I will also do with you as well.
I read this as a bit of a threat. Either give us a five star review, or we will give you a negative review.
As soon as you start using a metric (reviews) so heavily, people will start gaming it, and it's no longer useful.