Reddit is provided by the owners to people in Germany, say. You can't ship goods/services to Germany bearing swastikas, AIUI, under their law. If Reddit sell to Germany (eg Reddit Gold) then they likely broke the law. /IANAL

The only sub that returns a 421 ("Unavailable For Legal Reasons") here in Germany is r/watchpeopledie, as can be seen in Reddit's latest transparency report.