A portmanteau word:

Cause + Litterati: This could refer to individuals who are well-known, influential, or prominent in their advocacy for certain social or political causes. The term "litterati" is a play on the word "literati," which traditionally refers to highly educated or literary people.

Cause + Glitterati: In this interpretation, "causerati" might describe individuals who are both influential in social causes and have a glamorous or celebrity-like lifestyle. "Glitterati" is a term used to describe the fashionable, wealthy, and glamorous elite.
"The thing about the Bollywood causerati is over the years we have come across very few efforts that have stayed on in the mind."
by Lit Balak July 24, 2023
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