You should really spend more time reading what is actually said instead of what you think was said.
"Hearthstone®’s latest expansion, Forged in the BarrensTM, launched on March 30 and is on track to deliver expansion-over-expansion net bookings growth for the second consecutive release."
Net bookings just means that they got more pre-orders than last expansion (it could literally be by a handful of pre-orders; notice that they don't give a percentage)...which is much lower than in it's heyday.
There is a reason Blizz doesn't talk about MAUs for specific products anymore; they like to play games while trying to deny that, overall, MAUs have been dropping for years (go through their annual reports looking for the MAUs of Blizz properties if you don't believe me -
https://investor.activision.com/annual-reports). There is a reason Blizz doesn't break out individual properties anymore; it is too easy to see how spending on their games have been decreasing while numbers of players is decreasing...increased profits, but not increased player base (heck, not even maintaining player base...it takes 3 versions of WoW now to show almost steady numbers).
You are the one "flat out misinforming".