Yes. It’s one of the places refugees went from you-know-where when their subforums were forcibly shut down during a purge a few years back. Mostly hate groups and the like, though there were some folks who left because they wanted less policing from the admins. “Free speech means bad as well as good” advocates. This means there might be non-hate spaces there, but I haven’t really looked.
You might remember that Voat was the most popular place for the same refugees at the time, but for various reasons, that site is now dead. (Not that there haven’t been attempts to resurrect it.)
Saidit hasn’t died, but maybe that’s a mixed blessing because that survival might be precisely because it wasn’t popular.
Isn’t that the alt-right platform?
You might be thinking about voat.xyz. Saidit is more moderate, due to the nature of its TOS and a “pyramid of debate.”