My start-up does the same for both print and digital. Full partnership with authors.
PW: "With e-book royalty rates still a contentious, if lately less openly-debated, issue, indie house Other Press has announced it is raising its e-book royalty rate to 50%. (The reigning e-book royalty rate sits at 25%, though major publishers like Random House have adopted a shifting scale-rate, that can go up to 40%.)"