"In a professional context, pixel-tracking is a fairly benign tool; it can be used for content marketing, lead generation, or reëngagement. But it takes on a different sheen when it’s deployed for personal use ... it’s still not obvious why productive people should want to track their correspondents the way marketers do."

- #AnnaWiener

https://www.newyorker.com/tech/annals-of-technology/what-the-superhuman-controversy-reveals-about-the-shifting-ethics-of-software