I wonder if this has anything to do with your search history? Because I don’t see Chess-Chess with Friends in my top 40 on my iPad (and 41 is a 4 in a row game so I stopped scrolling). And, I doubt there’s very many paying $30 for a subscription when there are at LEAST 40 other options of vastly varying price levels.
Also, most people don’t search for games on the App Store. They Google “ios chess”… and THERE they will find Chess with Friends

but not only that, links to pages like
And, if that page doesn’t provide the info to let them know which one to get, they can search their reddit communities, ask their friends on the social media of their choice, etc.