I'd thought Reddit subs prohibited links because it attracts spam and marketing disguised as organic recommendations. For Twitter, they promote organic content

I'd thought Reddit subs prohibited links because it attracts spam and marketing disguised as organic recommendations. For Twitter, they promote organic content "for free" but want to make the inorganic stuff pay money for promotion. Discord is close the original poster's idea for a social network, replace "social circle" with "Discord server" and lower the member limit for a server. Back to your topic, a semi-private Discord server/social circle moderator can ban anyone posting spam links so its not a huge problem there.