Substack SMEARED, Accused Of Promoting EXTREMISM. Platform Says ‘We’re Protecting FREE SPEECH’ Keith Preston 3 years ago Vice president of communications at Substack, Lulu Cheng Meservey, weighs in on Substack being accused by some as being a ‘haven for extremists.’ Attack the System Click to print (Opens in new window) Print Share on Tumblr Click to share on Reddit (Opens in new window) Reddit