There are as many types of subsidiary rights as there are formats and platforms for storytelling. (thebalancecareers.com)
S / he will also sell subsidiary rights, if they have been retained, after the book is sold. (be-a-better-writer.com)
The publisher has little or no incremental out of pocket cost to create ebooks, therefore the income should be split in the same manner as subsidiary rights, which is generally 50/50. (blackplasticglasses.com)