maybe if you have a great list full of eager buyers who trust you, then maybe it can be passive.
I thought once I had a couple Amazon sites up, it would passive "smooth sailing" from there. wrong!
i have to pay an outsourced seo guy to keep my site at it's current spot. maintenance fees is basically what it boils down to.
don't get me wrong I'm making on good months, nearly double what I'm spending on seo maintenance but I wouldn't exactly classify it as passive income....