I won't quote you in case you delete your post. I am going to guess than any third party staffing company working with Apple has a strong non-poaching agreement that Apple won't hire applicants from the third party for some specified time period.
Most staffing and temp agencies have these agreements with employers.
Separate from this response to the post above, why is the graveyard shift so popular, at least seemingly so among applicants on this forum? I find it very surprising. I'm a day shift only applicant and haven't read anyone else who recently had that preference.
I would much rather have a day shift, but I'm open to night shift if it gets me on with Apple quicker. I thought they'd have a harder time getting graveyard shift but it doesn't appear so.
I've decided to hold off on anything Apple third party related for now. I'm still just waiting somewhat patiently.