Thank you very much for this well-reasoned and helpful comment. Many of the OA publishers that charge article processing charges claim that they offer discounts or waivers for authors in developing countries, but I am not sure how often these discounts/wavers are really given, because I do get emails from many complaining about how the fees make publishing in OA journals impossible for them.
Of course, authors also have the option of publishing in traditional journals, those that do not charge a fee. They can make this work open access by depositing a postprint in a repository (this is called green OA).
Thanks again, and I hope you make more comments in the future.
