I have recently published an article in a Taylor & Francis journal. The journal asked me to pay more than 3000USD to make the article open access and post on RG and other platforms. I was shocked by that demand. The article is currently under a paywall and people cannot access it unless I share the PDF with them. As far as I know, this is a common practice by Taylor & Francis, Elsevier, Sage, Wiley, Emerald, and so on.
I would love to hear what the RG community thinks about this type of practice.