I've just enabled a new feature on all premium Pagecord accounts that generates an Open Graph image for all posts that don't have images in them (if a blog post has an image, the first image in the post is used as the open graph image). I'm not enabling it for everyone yet because, (A) I want to test it for a while to make sure it's robust, and (B) maybe it should only be for premium customers since there is a (minuscule, admittedly) processing cost over time.
Let me know what you think. All being well, this post should have such an OG image :)