"Two open source libraries GitHub have been purposefully corrupted by their author, and as a result, thousands of open-source projects were bricked. The author says he did it because he no longer wants to create free code for commercial companies making millions."
Please see https://www.techradar.com/news/thousands-of-open-source-projects-taken-down-by-disgruntled-developer
This post, and how it explains that there's 30 people working there now, made me realize that if I care about signal continuing (and I do, since I really like it, especially that it has a dedicated desktop client), that I should see how it makes money and whether that's sustainable. Turns out it's donations, and now I'm a donor through monthly charges through the mobile app. I actually opted for that specifically because their web site noted that they can't give you a badge in the app if you donate online, and I thought showing the badge would be a good way for other people to see and inquire about, and hopefully realize they can donate too if they care to.