A restaurant owner who asked for 1-star Yelp reviews
I am a former Yelp engineer who worked on the review filter and had full access to Production.  There is nothing in the code or infrastructure that allows sales to filter reviews.  End of story.  Any other position is for your own entertainment.Users can and will be creative on the site.  Making fake accounts in order to mislead others is not a creative practice that aligns well with typical users of Yelp.