Earlier quoted context omitted.
It actually is almost nothing like the auto updating feature. Finch is mainly used for A/B testing. It doesn't push actual updates, all it does it turn existing features (flags) on and off. It's used for quickly A/B testing or incremental rolling new features and is designed to be more agile.
That means it uniquely identified you to Google every day then, right?
> not wanting to be tracked
here's a hint: ad impression for unknown user is 0.01$ and for logged in user 2$. guess why Google has a browser now...