As for now, you need to vote in all categories. Keep in mind that BTS is in page 14,16, and 22.
https://kca.nick.tv/vote/
You can also vote via Twitter:
Favorite Music Group
➝ #KCA + #VoteBTS
You can also vote via Twitter:
Favorite Song
➝ #KCA + #VoteDynamite
You can also vote via Twitter:
Favorite Global Music Star
➝ #KCA + #VoteBTSGlobal
Twitter account must be in public.
Have more than 10 followers.
RT do counts as vote.