The notion of "predatory" publishing in OA has been around since 2009. The notion itself is controversial and has been challenged.
See Anderson, Rick. "Should we retire the term 'predatory publishing' "? the scholarly kitchen, May 11, 2015. https://scholarlykitchen.sspnet.org/2015/05/11/should-we-retire-the-term-predatory-publishing/. Accessed Oct. 19, 2016.
A predatory publisher may...
Source: Scholarly Open Access: Critical Analysis of scholarly open access publishing, a website authored by Jeffrey Beall