Just noticed: the number of visitors to my shop over the past 4 days has been around 10 a day - at least according to google analytics, which could be broken too of course.
This is from an average amount of visitors of about 150 / day, with spikes of up to 650 visitors.
Currently the Analytics code is only on the main page of a shop.
I wonder if the new Google Analytics "Try Google Ad Planner" link which reveals shapeways sensitive data regarding monthly traffic by tracked cookies has anything to do with that ...