Printing credits = press time. Press time is easy for us, hard for them. Easy for us, hard for them is how you get to reasonable margins and value creation.
UPrinting.com Provides Free Printing for Non-Profits - from WhatTheyThink:
"UPrinting.com offers a blanket 10% discount on all online print orders (up to $150) for any eligible non-profit or charity. In addition, the U-Community program offers four different sponsorship programs exchanging UPrinting.com logo placement and web links for free printing credits. For example, a non-profit can earn free full-color brochures, business cards, flyers, banners and other products in exchange for acknowledging UPrinting.com's support on their website and promotional materials."