Honestly they probably do. I think this bc some people would think the scandal is bad, and there are always people who disagree and dont think the idol in question deserves hate.
plus if people didnt know about the group prior to the scandal, they might listen to some of the music and possibly stan the group. scandals definitely get groups more recognition.
I dont remember the name of the group, but it was a gg and they had a scandal over something they were wearing, and i heard rumors that the company dressed them that way to get more publicity. so yeah i think scandals can get groups more fame.