I am increasingly seeing contradictory licensing statements on the websites of low-quality, questionable, and predatory publishers.
Typically, these publishers include the Creative Commons Attribution License (CC BY Logo) along with a copyright symbol © accompanied by the statement, “All rights reserved.” The image at the top is one example, and here are two more.
These statements are contradictory. You can’t have it both ways, because the “all rights reserved” contradicts the CC license which allows unrestricted copying and distribution (provided you attribute the author).
I think the publishers do not understand the function of Creative Commons licenses and mistakenly think they are a license to publish, that is, an imprimatur. They see these logos on the websites of other publishers and copy them onto their own, hoping to look legitimate.
Predatory publishers often lift content — such as author guidelines — from other publishers. In this case they reveal their incompetence by presenting contradictory licensing statements.