I'm sympathetic, but this seems like a sort of Wikileaks for Tech kind of idea.

https://www.speakout.tech

Unethical uses of technology and tech monopolies are old problems, but what's new is the pervasiveness of data gathering. It was seeing some of the unethical stuff being done behind the scenes by software companies and contractors which was one of the main factors which got me into Free Software in the first place in the early 2000s. When the source code is public there's a much bigger incentive against inserting antifeatures which then enable arm-twisting business models and data-for-sale.

Whistleblowing projects like Maven obviously does have some effect, but a better approach would be a campaign promoting the advantages of software cooperatives rather than feudal style organizations. The problem of Maven was really that only a few people get to decide in secret what Google does or doesn't work on.

If a whistleblowing approach for tech companies were successful it would mostly just reveal what we already know: that capitalism depends to a large extent on jettissoning ethics and cynically exploiting people so that a few can profit massively from the value extracted.