I just got this message from Rana Ashour of Paleontology Journal , an open-access journal published by Hindawi, who are generally felt to be a perfectly legitimate publisher: (Apart from anything else, the waiving of APCs pretty clearly indicates that this is not a scam journal.) I replied: Let’s hope they go with it. I’d love them to build another low-cost, high-quality, journal in the palaeontology OA space, to compete with