Dan Andreescu, 18/11/2015 22:32:
But that was explained to me as "we started
filtering spiders better".
So I don't think that would affect Alexa's numbers but maybe it's a bad
coincidence that around the same time something else happened that
dropped the numbers. And the convolution made us all miss it.
Or maybe the Alexa stats contained the same filtering error and fixed it
at the same time as us! Sounds unlikely.
Nemo