[PopePompus]

Yes, there was copy-editing. After peer-review and acceptance of the paper, the journal would send me marked up versions of the paper ("proofs") that made the paper conform to the journal's style, fixed typos, etc. There were often a couple of iterations concerning these changes. Finally a set of proofs would be accepted, and the paper would be published. Somebody was doing the work of making those proofs, and it wasn't the peer-reviewers. I'm pretty sure that the journals paid people to do that work, and since I was being charged hefty page fees (about $200/page) I suspect some of that money, and perhaps some subscription money, was paying for that work.