This, apparently, is how terabytes of data got leaked from Parler: https://www.reddit.com/r/ParlerWatch/comments/kuqvs3/comment/giu04o6
Alternate explanation: "Parler lacked the most basic security measures that would have prevented the automated scraping of the site's data. It even ordered its posts by number in the site's URLs, so that anyone could have easily, programmatically downloaded the site's millions of posts." https://www.wired.com/story/parler-hack-data-public-posts-images-video/
Okay, finally. The story straight from donk_enby: https://www.vice.com/en/article/n7vqew/the-hacker-who-archived-parler-explains-how-she-did-it-and-what-comes-next
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