check out how there are ways of users sharing pictures from their albums. So, angels taking photos of events could post them to the CLP Facebook page ;-) Also, you can embed zazzle shop (printing on demand). check it out.
Again, this can link to our web and etrategy, starting off with the spaces that angels use, to influence others ;-) fab!
You could try a printing on demand service like this to reduce costs? Perhaps invite your community of learners service users to co-create cards, photograph artwork then put on cards! - so order only what service users want and go from there! with a trackable link (on the back of the card) you could get the postcard to sell itself ;-)
Postcard Printing, Post Cards, Custom Postcards, Create a post card