Earlier quoted context omitted.
Yelp is accused of predatory practices on business owners including pushing them to sign up for a paid subscription to hide negative reviews on their Yelp page. Otherwise, you are vulnerable to their algorithm which hides/shows reviews that are often less than favorable. Yelp reviews are now overtaking business' own pages on Google searches leaving businesses with less option to control, let alone, curate their brand…
They're not just hiding negative reviews if you pay, they are hiding legitimate positive reviews if you don't. It's simply the online equivalent of the mob asking for protection money.
Their algorithm rules all, sales has zero say in it.