If you've used Gumroad before, you've probably been annoyed to learn that all the great permalinks have been taken. Previously, there was one "book" on Gumroad. No more! Now, every creator gets their own.
E.g. You can now use "book" for your book, "course" for your course, "membership" for your membership!
(This is possible because last year we switched to creator-led subdomains.)
Have fun customizing!