Players that erroneously received a classic pack in this last week's Tavern Brawl, When Clones Attack, are going to be getting 100 Gold compensation for the error early next week. 

Congratulations to those that participated in the brawl right when it dropped before the error could be corrected - enjoy that fresh Stormwind pack! For everyone else that wasn't lucky enough for the upcoming gold, why not open up a pack in our simulator.

Quote From Kerfluffle

8/6 UPDATE (edited): Early next week we’ll be issuing compensation in the form of 100 Gold for players who received a Classic card pack instead of a Year of the Phoenix card pack from the When Clones Attack! Tavern Brawl. For impacted players, no action is needed - the Gold will show up in your account automatically.