That's fair, and a bit ridiculous considering the license allows them to do what they are doing, minus lacking the attribution. People are too illiterate on software licenses. If you're going to use open source software, learn the licenses you're using! I'm pretty sure GitHub literally shows you what you can and cannot do with specific licenses.
Edit: Yeah they do. There's no excuse for goofing this up.
Edit: Yeah they do. There's no excuse for goofing this up.
https://github.com/simstudioai/sim/blob/main/LICENSE