I'm honestly at a point where every suspicious aspect of that post could as well be counted as a countermeasure to getting caught. Said engineer could still be working at the company or could've left years ago. In my opinion the mentioned financial adjustments could've been a discussion topic for higher ups far far earlier than 2025.
Considering how ruthless Uber has acted thorough the years[0] I am almost 100% sure other startups with similar opportunities have at the very least committed crimes on a similar scale to the linked Reddit confession.
Bonus option: The Reddit account starts astroturfing in a few weeks and this was just a run-of-the-mill bot automation to gain karma which happened to overlap with HN interests.
[0] https://en.wikipedia.org/wiki/Controversies_surrounding_Uber
Back in the days before LLMs, I went out of my way to set up the Compose key on Linux, just so I could do cool things like —, ®, ™, and ¹ quickly!