Help with blank/zero values on cohort analysis

Hi EugenioProlog 
Thanks again for confirming the expected triangle logic, that helped shape the final approach. I initially explored using a separate filter like IsLifetimeValid, but in the end, I realized it's not needed if your base cohort measure already limits values based on lifetime logic.

Instead, I adjusted the main cohort measure like [Cohort] to include this logic directly, for example go though bellow dax.

Cohort = 
VAR CurrentLifetime = SELECTEDVALUE(Lifetime[Lifetime])
VAR MaxLifetime = [Maximo Lifetime]
RETURN
IF (NOT(ISBLANK(CurrentLifetime)) && NOT(ISBLANK(MaxLifetime)) && CurrentLifetime <= MaxLifetime, [Subscriptions], BLANK())

This way, the triangle shape naturally forms, and you don’t need to apply IsLifetimeValid as a separate visual filter.

Here’s what the final output looks like for me matches what you expected.

Hope this clears it up and simplifies things further. 
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Thank you,
Akhil.