I have a Patreon page where some of my fans choose to support me. If they contribute $5.00 a month, I send them every book I ever publish, the second it’s done. It’s pretty good, and usually ends up saving them some money.
There’s just one problem: I have already published many, many books, and my patrons don’t already have them. So if they want to catch up on what I’ve already done, they have to go and spend a lot of money on my back catalog.