I honestly didn't expect this from Reddit. It seems like investors are really tightening their grip and they are banning subreddits and long-time users who oppose these changes left and right.
I built a free API emulating the Reddit API[1]. It was returning the same data as the existing publicly accessible .json endpoints on reddit.com (for example https://www.reddit.com/r/Save3rdPartyApps.json). They not only blocked my requests, but also banned the subreddit I created and my 13 years old personal Reddit account (permanently!).