In reply to Bradley Allen.

I understand the logic that it makes sense to advertise a pro feature there. But then I suggest that there needs to be a "Hide this Message" option after clicking the (+) plus sign.

Whether it's a banner advertisement for hosting or a small box upselling to premium, it's bad UI/UX and should not be forced upon the user's screen each time she edits a post. At the very least, there should be an option to dismiss and hide the upsell.