Now that Amazon and USPS have a deal in which USPS will deliver Amazon packages on Sunday, if you have a vendor that is on their game with shipping it is entirely plausible and easy now to get your DNM goodies on sunday. Just place an order on Amazon when or shortly after you place your DNM order and choose the shipping option which will put the item getting there Sunday. When the postman comes along with your amazon package, your DNM package and any other mail will come right along with it.
Unless you're shipping and receiving heavy amounts of weight I really don't see how this could increase risk factor any more than just ordering from the DNM already. Thoughts?
This is not true in my experience.