Is mobile gaming data more and more concentrated?

Is mobile gaming data more and more concentrated? It seems so and I was touching a few times already.

Especially on revenue side it accelerated in the last months based on Sensor Tower data (here is the revenue data divided into segments: top 10 games by revenue, top 21-50 games by revenue etc.. comparing last months with previous period). Data shows that “head” and “tail” of games increased or kept its position there.

Any comments or observations?