Not all Open Access Journals are predatory. The Open Access publishing model does not make a publisher predatory. Their unethical business practice does.
Source: PHD Comics (8:23)
Open Access is the free, immediate, online availability of research articles combined with the rights to use these articles fully in the digital environment. Open Access is the needed modern update for the communication of research that fully utilizes the Internet for what it was originally built to do—accelerate research. -- SPARC
"Open-access (OA) literature is digital, online, free of charge, and free of most copyright and licensing restrictions. What makes it possible is the Internet and the consent of the author or copyright-holder." (Suber, P., 2012).