Interesting, because I think the people that leave 1 star reviews are typically pretty motivated to do so, especially when it is a single one. Possibly they want to see a balance between positive and negative reviews.
On a related note, I’ve been getting overwhelmed with “How’d we do?” after the fact online surveys lately - doctor visits, rental car, retail shopping - and I can’t help but wonder if along with actually trying to improve their services, these surveys act to manage the narrative. That if I can complain to them, I won’t complain to Google, yelp or TripAdvisor.
Absolutely, that's precisely what they are for.
One of the best is a person who wrote: "Shitty service, never been there" and it their only review.