I've spouted this before and I think I was yelled at by the owner. Some people on here want everything no mater what.
Next someone will be asking for the pan and scan versions where there isn't actually any panning, so they could just take the blu-ray and crop it themselves, but of course, they want the commercials too. Why oh why? Oh, I forgot, some site has bit/byte-ratios and inflated compression-ratios and filling releases with useless things is the norm.
Much of this stuff is just wasting bytes.