I would probably think of an example in K-to-12 publishing, where authors are almost entirely not name brand or recognized authors. They're working as part of a team. They may be working on only a very specific part of a resource because they have deep subject-matter expertise in a certain area, be it mathematics, science, or any other field for that matter. Their model, if you will, is not such that they have an opportunity to further capitalize on their presence in that marketplace through subsequent subchapters in the next grade 9 math textbook. They have one shot at it and they would like reasonable compensation for the time they put in. A lot of that compensation is based on royalties, which are based on sales. When sales go down and royalties go down, they haven't really gained much.
Even if they have a very successful launch that they are part of, there won't be another way to monetize that down the road in the next textbook. It really depends on the work that goes in up front.