Occasionally. There are lots of junk "peer-reviewed" journals that are basically pay-to-play. Every so often we get requests for full-pipeline research for those journals (I do not personally bid on those so I don't know how they progress). Sometimes we get project requests for helping with edits / proofreading / finalizing formatting and similar for completed research that's about to be submitted, or that journals have asked authors to revise/resubmit. I haven't worked on those tasks personally, but I know we've got a lot of professors who can probably do that in their sleep.