One of the reasons I have always found the internet so exciting is because it facilitates a kind of interaction which I find a bit magical: any time it is possible for somebody to help someone out by using information or material which has been publicly shared. That way, the person who needs help can make use of the photo or follow the instructions without any need to correspond with the person helping them, or for that helper to even still be alive.
My photography is released under a Creative Commons license to facilitate such usage. My usage guide explains the generous set of things you can do for free, including making prints for personal use or for inclusion in anything you aren’t selling.