“The sum of this is that alt-tech, fringe, and mainstream platforms were exploited in tandem by right-wing activists to bring American democracy to the brink of ruin,” the staffers wrote in their memo. “These platforms enabled the mobilization of extremists on smaller sites and whipped up conservative grievance on larger, more mainstream ones.”
https://www.washingtonpost.com/technology/2023/01/17/jan6-committee-report-social-media/