I see a number of people here describing Parler as "unmoderated", but it turns out they do have extensive moderation [1] that they use to ensure ideological conformity in their posts. Then the most active users were paid for their content too [2]. This really makes it more of a propaganda weapon than a free speech platform.
[1] https://twitter.com/donk_enby/status/1347939939120533506 [2] https://twitter.com/donk_enby/status/1346565749977051136