Who has a problem with APCs? – Current state of research | Open Science

"In the humanities there are usually no author-side fees for publication in open access, but when they do occur they are more frequently paid by researchers themselves. Fees in the humanities also seem to be relatively low. In biomedical sciences the situation is the opposite. Fees are common, and relatively high, but they are most often covered by grant money. What are reasons for this phenomenon? Is it going to change?"