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> Very few users have a staggering amount of fingerprints, for example 20-25. I don’t know if they have a lot of devices, use different browsers or something else.

They probably use mostly public / school computers to access the website.

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Or maybe those accounts are shared ones. It's common practice for kids to share accounts so they don't have to buy everything.

Or maybe they are just changing their browser windows size by hand, which would lead to a lot of different resolutions.

He's hopefully using screen width (window.screen.availHeight) rather than browser width (window.screen.height)

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