Good catch OP although I feel sad for some of them as they have been very active and obviously they spent a lot of time and effort to build their accounts.
Maybe admins will take that in consideration and give them a temp ban instead of a perma ban!
No, not a ban. This is an act of fraud, the ultimate, they must be removed from the campaign they are participating in and the accounts must be tagged at the same time, which means they do not have the opportunity to participate in any Any other campaign, there should be no tolerance here. Are you talking about tolerance for thieves? No, this guy must be punished Maybe admins will take that in consideration and give them a temp ban instead of a perma ban!
EDIT:
Believe me or not, we're friends and he's my schoolmate and he's also one of those who helped me when I was just starting.
Anything else? Your family, brother, sister, father, mother, ... There are hundreds of people who explain like you before 
I know some of the accounts were tagged, then they explained that they were in a group, they were friends of each other, then they got a second card with group cheating, what would you do at here?