You make good points,
From personal experience, specially in hhn, I see many more shirts of ghost in the park than slipknot, ( specially younger people)
Someone earlier mentioned people wearing slasher shirts this year in the event,
and musically speaking, I don't think I ever saw a slipknot shirt this year or last year lol,( except me when I wear my old school- first album- slipknot sweater lol. )
But I also see a lot of girls with Ghost shirts too, and younger people, And yes, Ghost songs appear on tik tok as well, and I have heard their songs on Instagram shorts as well.
I was just thinking that ghost is kind of on people's radars recently, hip with the kids, made into memes and since they worked on Halloween kills then they kinda had that connection to universal already.