“(Publishers/journals) … that unprofessionally abuse the author-pays publishing model for their own profit.” 
--Jeffrey Beall, Librarian, University of Colorado
Scope
- Estimates vary greatly depending on criteria, sampling
- Between 4,000-8,000 predatory journals; mostly in India, elsewhere in Asia
- Estimated size of market $32-$74M USD
- Between 165,000-420,000 "predatory" articles in 2014, versus 53,000 in 2010
- 900+ publishers in 2016 versus 18 in 2011