Dbrand is not that special, Samsung billion dollars ads campaign doesn't make their phone more durable and premium either. It doesn't cost them much to produce each considering it's a sheet of 3M cut to predetermined shape, $0.5 is about right, make that a 1000% mark up.
I use Skinomi, they also use the same 3M material, but I prefer the transparent back screen protector which dbrand don't have.