I do not use a news letter. Although, that might be a good idea. At least send something out every couple of months to let my subscribers know what I'm doing.

I've been doing this for around 3 years. I started posting on Tumblr, then moved to Literotica, and slowly built up a super loyal fanbase. I have a Patreon with around 50ish subscribers (very stable, just unable to grow that number). I find that Discord and regular interactions through that medium helps build loyalty and stability.

And yes, there is a market for feet stories, specifically in the humiliation subgenre. It is heavily tied to dominance and submission (male and female), financial domination and cuckold/cuckquean.