B5DNNCuration is using an "alert" from TalkWalker, set up to scour the internet for content that contains the words "Content" and "Curation." The minimum words must be 200 words and there is no maximum word count. The keywords can be in the title or summary of the content as well. I have linked B5DNNCuration the blog below and set it to auto-export to the blog on a timed schedule. It will not use content that doesn't have an image associated with it.
Every post on the blog is done automatically through no intervention on my own with the exception of finding choice content in the queue and manually exporting it.