For a while it wasn’t in the US. They now have a cut-down version. But a lot of people use VPNs to access the less-restricted international version. So to answer your question, a lot of users are using it in a way that’s illegal.
It creates financial incentives for anti-social behavior and the proposed benefits of it being a way to determine truth are dubious and self-serving and would not be worth the societal cost regardless.