Good point! We've been selling for several years, but legal isn't our only/primary market. We've made much more headway in the higher education market, since students have to read so much on screen (and don't have these perverse incentives related to billable hours!).
But we actually run into the same buyer/not user problem on the licensing side of our business. Textbook publishers don't really care about the student's user experience, for example. This is because the textbooks are assigned by the professor, so students don't have a choice about which textbook to purchase.
Fortunately, we're finally going to launch an integration with a digital textbook platform. Not surprisingly it's a reseller platform, not a publisher. Unlike publishers, their product differentiation is more about the UI, so they're looking to provide additional value by adding our reading enhancement tech. [1]