They have a practical monopoly on web and mobile ads, if they really are stagnating then all they need to do is jack up prices by a fraction of a cent and it's

They have a practical monopoly on web and mobile ads, if they really are stagnating then all they need to do is jack up prices by a fraction of a cent and it's already billions in profit. I'm sure they have no problem increasing revenue over time. Given how stupidly common ads are, increasing prices and upping scarcity would be a good thing overall anyway.