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Bonus points if you go on to click on the footer, the infinite scroll kicks in, and your mouse cursor ends up on a link in the newly loaded text, which you end up clicking on. (Or video content, or whatever ends up doing something because you clicked)

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And then you click to go back and it doesn't resume where you were before, and instead dumps you right back up at the top, with none of the previously loaded content available.

Or in the case of Facebook, a new top, one that intentionally excludes whatever you were looking at before (because "it has been read" - even though you got no more than a glimpse in frustrated passing).

... then you get ads served based on that.

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