My experience here on Soundcore and Anker (other community) has been… never ask about when the winners are announced…when I ask, i never win 
may be its a Jinx , but will avoid going forward and hope it to be a surprise (if at all I win)
Who's Ready For A New Era in Sound?
On the other hand… if you win, it can take a while to get your prize!
You got it! 
Yes!! Just got my coupon.