As you know from other posts, I'm not an expert. However, I think I might have a suggestion based on what I read.
1) It tells you that the buck (or maybe several of them) are in the area and in the rut.
2) It tells you that the buck believes there're does around too (does' bedding area might be downwind).
3) It might tell you size of the buck (he might imprint his antlers), but I am not sure if you can read them. I sure cannot.
What he's doing.
1) The book I am reading now suggest that making a scape is pleasant to a buck.
2) Since he don't revisit those scrapes, he's not serious about getting a hot doe scent there (it contradicts what I said before, but what I said before there's does in the area in general, but theese particular scrapes aren't his primary visit spots for them does).
3) So, he probably just marks his territory with those scrapes and gets himself a quick pleasure.