I would also say it because of the text - it's like a signature - or could be understood as such.
'Non-compliant file This reason means that your content doesn’t comply with our Contributor Agreement. Content may be non-compliant due to watermarks, inappropriate or irrelevant keywords or image titles, or questionable, or defamatory content. Your file is also rejected as non-compliant if you receive a reminder to submit a model or property release, or resolve a problem with a release, and you resubmit the file without addressing the issue.'
@Ernie09er There is no reason to place your own text into an image as you have it here as a "message" as it's up to the person licensing the image to add any text or messages they want to use with their own design. You could use your motto in the keywords, though!