Well, don't be so sure.
The player is supposed to be paying for products and services that are rendered by the advertisers.
The advertisers need the people who see the ads to purchase what they are selling.
If this doesn't happen then the advertisers aren't able to afford the ads.
If they can't afford the ads, developers don't get paid.
What you describe is the natural ebb and flow of the marketplace. It prunes the less desirable games since those businesses can't attract the customers.
Advertising dries up because businesses cut back on their advertising, not because of a glut of too many games which is the basis of your post. I am just not seeing the link that you were suggesting.