Is having a second account (aka clue slave) a bannable offense?
A: Technically, yes, though personally I have doubts that they would ban you for a few extra accounts. Most likely their concerns are mass account creators who intend to sell. But keep in mind, it is technically bannable.

日区的帖子
【アークナイツ】結構垢banされてるんだなw

那全服人数惨遭大幅削减