Not really the same because you need to... download Threads. It's just a sign in button. Tell me. Do you know what's Facebook Lasso? It was also a FB app that

Not really the same because you need to... download Threads. It's just a sign in button. Tell me. Do you know what's Facebook Lasso? It was also a FB app that used FB login. You remember Flash app? Why it flopped? What about IGTV? Used the Instagram account.... Social graph is important, but is not the most important thing, or else every dev would be rich by just using "Login with Google". The reason 100 million signup here is because Twitter is tanking - there's a demand for a twitter-like social-network. Doesn't mean that people gonna use Threads of course. And anyway, the case with Google is different because you didn't needed to download anything - they turned your account into Google+. Wanna comment something on Youtube? Ops, use Google+.