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DO NOT FUCKING DO THIS ANONS!!
This guy is trying cross reference your browsing history with your 4chan posting history.
If your id here is tied to your post history and you post your ID in that site, the site will track you by setting a cookie in your device or using some other form of fingerprinting and then use pixel trackers in ads, emails, games, etc to read that ID and see the browsing habits of the user associated with the 4chan post history.