Actually we are talking about Activision Blizzard here.
Just because you failed to write the topic correctly, maybe because you don't even understand the difference or maybe just to deceive people, doesn't change the fact that not Blizzard but Activision Blizzard joined the index.
No how is this topic related to WoW? Hearthstone and some Activision games did well. WoW did not. This topic seems unrelated to WoW.