How would caching work if it is a (uniquely) _tracking_ pixel? | Hacker News

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		mathnmusic on July 2, 2019 \| parent \| context \| favorite \| on: Superhuman embeds tracking pixels in user emails How would caching work if it is a (uniquely) _tracking_ pixel?

umeshunni on July 2, 2019 [–]

They cache the image when the email is received, not when it is opened.

mathnmusic on July 2, 2019 | [–]

Which would break tracking because open-rate would be 100% even if the user is on vacation.

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