Google now ships "ads" with their Android system update?

This morning Google asked me at what time to install the latest _systemupdate_. It seems that one should check the changelog, even if it's from a "big serious company", because this one comes with some kind of "advertising" now:

>> Instantly customize your Pixel with Harry Potter Audiobook Packs to celebrate the release of Harry Potter: The Full-Cast Audio Editions on Audible. One tap changes your wallpaper, icons, and sounds with elements from the audiobooks - no wand required. To begin your journey to Hogwarts, all eligible Pixel users will receive a two-month Audible free trial.(2) <<

https://support.google.com/pixelphone/thread/466181739/september-2026-pixel-drop?hl=en

Should I have done that earlier? Is this common practice? They specifically announce it as a "Systemupdate" coming with actual "security features" (scam protection):

https://nickyreinert.de/2026/2026-09-29-wad-ad-features/google-pixel-8-pro.jpeg

I am not even a Harry Potter fan. (ง •̀_•́)ง