I saw this and it appears to be legitimate. CoH2 is currently free on the Humble Bundle website. Below is a link.
https://www.humblebundle.com/store/comp ... e_Announce
As of me writing this post, it will only be free for another 42 hours, so share the link with all of your friends as soon as possible! Get them to download CoH2 while they can (if they do not already own the game).