That "whistleblower" has no credibility left:

>> In 2014, Wylie co-founded Eunoia Technologies[9][23] along with former SCL/Cambridge Analytica senior staff Brent Clickard, Mark Gettleson and Tadas Jucikas.[23] In describing his ambitions for developing Eunoia, Wylie stated, "I want to build the NSA’s wet dream".[23] Eunoia Technologies has been criticized for the similar psychographic profiling tactics used by Cambridge Analytica,[9][23] using the same dataset shared by Alexander Kogan.[9][23][24][25]

https://en.wikipedia.org/wiki/Christopher_Wylie#Eunoia_Techn...

So he basically accused Cambridge Analytica of doing what he then went on to do with his own firm. It's great that we learned all that shady business going on, but it's clear that Wylie's motives were not altruistic.