I give them tons of credit for this! With Twitter becoming, in my opinion, basically a Nazi echo chamber, the corporate brands and public personalities staying on the platform basically lends it legitimacy. It says "it's normal to hang out in public places where hate groups thrive and are encouraged". Microsoft making this choice is sending a public message that Reddit's conduct is making the place unsafe - that it's not perfectly normal to hang out in the subreddit that are lacking moderation.

It's not necessarily a perfect comparison because I think Twitter's leadership is directly doing things to promote harmful and hateful content, whereas reddit I think is just hurting it's relationship with its own community, but the throughline is the lack of moderation making the content more extreme.