Great question. So far, I've just been doing this myself as a side project so I haven't spent much time thinking through how I would or could monetize it (open to suggestions on that). That being said, I think eventually, it would probably have to be some kind of subscription, if there's any real interest in it. It's not really built to be self hosted right now unfortunately.
But, I can't understand if this is a subscription service or I can simply self-host. I don't want to sign up without having that information first.