The trend USED to be that teams would act as decoys starting around F5/F6, so really just one or two extra teams running around/following production
It seems that has potentially changed, likely due to budgeting purposes.
Elimination Station was a good showcase of that (S11-S16), instead of teams showing up at the Elimination Villa, they would call in to inform the others of their elimination from somewhere on the course.
I also don't think we've seen a ton of decoys during the finale recently, either.