using those websites to find something or because you're in a niche community that only exists there =! being a redditor or a tumblr/4chan regular, those sites have specific political culture. Other sites are either a wildcard or straight up reactionary, I never encountered a "I'm an instagram reels leftist" because they'd say the n-word 50 times before they'd turn a corner and I never encountered a "I'm a facebooker" because those don't exist that's not a real word. I guess we could add bluesky into the list in a few years once a substantial number of its users stop being libs.