Well, for one thing, if the threads went to the top, and you had to tie off short, the threads would cut the sling
Uh... yeah, no shit Rob. This is really a last resort screw placement and I doubt that a screw manufacturer would even suggest this use of their product. I may be wrong, that's why I asked. My question is more of a curiosity on the manufacturing side. It seems the benefit of a little more bight to a longer placement might out way the benefit of leaving a clean portion of the shank for tying off. Maybe they tested both and the difference was negligible... Maybe it’s a stupid question... I have asked one or two in my life.