As an occasional host we always wait until the guest writes a review. Our goal is to basically never have a guest write a review so we don't write them hoping they just forget. If we write one they get an email telling them that we did and really pushing them to review.
Our place is all five star reviews and there is very little benefit for further five star reviews. So it's kind of all risk for us at this point when someone does review.
Yeah well, the main talent required for being a host on Airbnb isn't to host well, it's to manage reviews well.
Reviews should have an expiration date, because places age and wear out; I'm not interested in learning about the experience of someone from five years ago, I'd like to know how it was last week.
Our place is all five star reviews and there is very little benefit for further five star reviews. So it's kind of all risk for us at this point when someone does review.