Ah, ok, wasn't obvious to me, either. I always wonder, if it's legal in Germany, because you need to have an imprint easily accessible (from any page I think). Might not be relevant for here, but am just curious.
Is there an easy way out of it after? The first time I used that button I had to turn off my Wi-Fi so I could down to the "top" and click the button again without infinite scroll kicking in.