How can I prevent posts with no internal image from showing a preview? Don't show any default image?
Not really a question, I figured this out, but I thought I'd post a solution in case anyone had a similar issue.
Simply set the default image as a 1px x 1px transparent png. You can use mine if you like: https://www.gerhardfourie.com/forum/plugins/Transparent-1px-by-1px.png
That pretty much does the trick 😎