Hội mua bán fanpage facebook — Can someone explain text-thread-image memes to me?

I am not a social media professional myself but I can’t find a specific sub to ask this question. Can someone explain to me why my facebook feed is full of people posting/reposting memes and/or “viral” images that look like grainy, fuzzy pics of discussion threads that don’t appear to have actually come from anywhere? At least once a day someone I know will post an image of what looks like a message board or a series of posts from some type of texting platform, all from different usernames with different avatars, that appear to be having a conversation with one another. I am firmly convinced that these threads don’t actually exist and are just made up by “content creators” who want to make a joke or illustrate a point using the format of a message board, a twitter thread, etc. They are usually linked back to some goofy facebook page like “Southern Girls who Love Politics” or “That Toronto Life” or something. Is this a recognizable genre or technique of social media post to any of you? (I’d post an image if I could but I suspect you’ll know what I’m referring to.) Where do these things actually come from? Where are they “supposed to” have come from? (It never looks like any kind
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