They had moderation. They were not free speech as in "any ideology of opinion goes". They were "arbitrary radical right wing speech goes". Free speech would mean aggressive communists could participate freely too. It was not the case, anything left was cut away.

Their moderation was to show post to 5 users and go with their decision. It was guaranteed to create bubble.

We should not use "free speech" as euphemism for "arbitrary racist, arbitrary inciting right wing speech". Free speech means those opposing right wing are equally unmoderated.