Because someone suing for false claims is now at the head of Reddit, and she has the power to censor things she does not like (and actively uses it). I'd day it's related.
Given that those comments don't actually violate any of Reddit's stated rules, there aren't many other reasonable explanations.
Then again, I called every single one of them liars, publicly, by name, after the recent subreddit closing drama, and I'm not shadowbanned so, who knows.
To put it as charitably as possible, the facts that came out during the failed lawsuit (and later attempt to get 2.7M out of the company to get her to go away) do not paint Pao in a good light.
Calling her a scam artist is putting it mildly, IMO. Real gender discrimination cases are tainted by this kind of BS.