Major - Discovery capping growth based on CCU?

I have recently noticed that my level “100 stories” has shown capped peaks on analytics.

This is not natural growth, because the peak would either be smooth (reaching the limit of players that are entering) or sharp (removed from the row).

However, the capped case means that past a CCU, the level doesn’t create new lobbies, which seems like a bug.

Analytics were recorded on Jul 15-16

Also the sharpest cut-off happened exactly at 1500 CCU, which is too precise to be random.
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One more example from another day:
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