Unity (former game engine company) has merged with an actual adware and malware distribution company. That's not an exaggeration. Fake Flash installers, was blacklisted by Microsoft's anti-malware tool, VirusTotal entires, that kind of thing.
https://blog.infostruction.com/2018/10/26/adware-empire-ironsource-and-installcore/
https://www.benedelman.org/news-021815/
Don't build your games on engines you don't have the source code to.
... if you can avoid it. Pico-8, GameMaker (though they're on some crappy subscription thing now), etc. are all OK for making smaller games. If you're going to invest many months or years of your life into some long-running project, maybe consider Unreal or Godot, instead.
