Startpage.com weird redirect searching "Chills"

So a friend asked me to search "Chills" on [Startpage.com](https://Startpage.com), which for some unknown reason redirects you to [https://Stopitnow.org](https://Stopitnow.org), a page for stopping child abuse. We tested if this happened with similar searches and some other conditions as well, but can not seem to discover why this happens. Try it for yourself, and any ideas as to what may cause this?

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