They did advocate piracy ... http://www.avast.com/lp-talk-like-a-pirate

More seriously, I wonder what the numbers are for the second most popular pirated key?

And more generally, what is the frequency distribution of users per key like? Is one pirated key dominant, are their competing rivals? What proportion of users share their key among only a few extra computers?

Also interesting is the approach they are taking to handling this. It will be very interesting to see what the conversation rate is, if they share that information as well.