Activision Blizzard more than doubled the money it earned from in-game sales in 2016

This whole “games as a service” thing is really working out for Activision Blizzard.

The publisher had a record fourth quarter and a huge year for 2016. A large part of that success is thanks to money made from in-game purchases, such as card packs in Blizzard Entertainment’s Hearthstone (which leads a potential $1.4 billion card game market). Activision Blizzard noted that it earned $3.6 billion from in-game sales in 2016. That is up more than double from 2015’s $1.6 billion.