I mean, most of my reading comes from authors who are literally only on amazon. And they're only on amazon because it's impossible to make a living trying to sell your book anywhere else. Brandon Sanderson has brought attention to this issue.
I'm supporting indie authors in a sub-genre that you literally can't even find in a physical bookstore. I get that bookstores are hurting, but I had to make a choice between small time authors and small time book stores.