Why has Yelp fallen off like that? It was and still is the leader in reviews but it seems like they are doing nothing to keep it or innovate. They are actively

Why has Yelp fallen off like that? It was and still is the leader in reviews but it seems like they are doing nothing to keep it or innovate. They are actively trying to lose it (like trump) but are in the lead because people have no alternative. Do they need new leadership?