Sir, I do not understand that You are critical of Hindawi publication, while at the same time you are referring OASPA. A Board member of OASPA sitting on the chair of Hindawi group !!!
Sir, I do recommend that you expose other journal, who are charging exorbitant amount for publishing articles. You are doing a tremendous job. Keep it up sir.
Research & publication should be an Open access to all. Why closed journal charges huge sum of money for just reading a research paper?