Yeah I just got the same thing. Heres a copy of it.
Dear ARMY, thank you for supporting BTS event. Congratulations~ You got the lucky prize for the event. You must check your email bonding with Webnovel account, we need some exact information to send the prize package. If you do not respond us in the following 5 days ( Before June 14 ), you will be thought of giving up the prize. Please check you email ASAP.
29 minutes ago
Two things wrong with this. First my user name is clearly not ARMY. Second despite receiving this notification 30 minutes ago there is still no email.