> I can't think of any publishers that are also in the business of printing and distribution
You're right that publishers don't handle printing, but they do need to handle distribution. Amazon won't help if you want to get books on shelves of retailers, and printers don't distribute. Smaller publishers will usually use the distribution network of a larger publisher. For example, HarperCollins and PRH both handle distribution in the UK for themselves and others.
Sadly I cannot account for this .. In theory I could check if the commits/or just head commit from PR founds its way into the main/master tree. But for now it just checks the status of the PR.
When was the last time someone bought you an ebook as a gift? This is is the main market for cookbooks, for example.