There are some whistleblowers indeed, but for the most part many dominant tech companies semiopenly proclaim these groups to be "dangers to society" and many admit to use "throttling", shadow-banning, and "machine learning fairness" to reduce the exposure to these thought crimes.

The only reason there are limited numbers of whistleblowers is that Tech companies actively brainwash their employees to think that the marginalized opinions are just some "small dangerous fringe nazi thing", similarly to how the commenters I replied to seem to think.