ProPublica: “In a Q&A with ProPublica reporter A.C. Thompson, former intelligence officer and data scientist Welton Chang explains how conspiracy theorists and violent racists fled to smaller platforms. Once there, their remarks festered and spread. Since Donald Trump’s election in 2016, an entire ecosystem of right-wing social media platforms has come into existence — from Gab (where the alleged Pittsburgh synagogue shooter posted hateful screeds) to Parler (a hot spot for insurrectionary activities in the run-up to Jan. 6) to the former president’s own Truth Social (which was frequented by a fan of his who was recently shot to death after attacking a Cincinnati FBI office). This new wave of apps and sites follows in the footsteps of 4chan and 8kun, older internet message boards that continue to attract a sizable audience of conspiracy theorists and violent racists. Welton Chang knows this corner of the digital world well. A former Army intelligence officer and human rights activist, Chang runs Pyrra, a small tech startup dedicated to identifying and tracking the extremist ideas circulating in these spaces. Pyrra, which launched in early 2022 with $1.3 million in funding, monitors more than 20 alternative social media sites and online forums, scanning some 100 million messages per week…”