I track them via the analytics event tracking API. It is really useful and full of surprises when you look at the stats: https://news.ycombinator.com/item?id=9

I track them via the analytics event tracking API. It is really useful and full of surprises when you look at the stats: https://news.ycombinator.com/item?id=9444862 https://news.ycombinator.com/item?id=9444862