http://sn.1w6.org/file/lnxw48-20160218T042031-xd2hztr.html
(This is not a comment on the moderation policies of any instance that recently triggered the conversation about free-speech vs censorship. I'm genericizing the above statement and then noting that beyond some level, restrictive policies on well-known instances that draw in new users end up restricting the spread of sites capable of #federation.)