I might be wrong here, but isn't Alexas data collected from that thingy a java-installation puts in your browser (if you allows it?)
And isn't Java some sort of slowly dying?
If so, wouldn't this mean Alexa-data will loose its value in time?
Again, this post was made out of something I believe I've heard a long time ago.
So I might be completely of here. If so, sorry
Jolly