btcmap is great. But my own experience of wanting to add my business to it was a bit problematic. As a web designer that works from home, they explicitly state that I am not allowed to list (unless I'm okay with random people coming to my home). So I wanted to create something that was a bit different, and that would allow businesses that do not wish to be tied to a specific address. So that was my inspiration to create Satmap.app - something where people could still define their general area, without divulging their address if they don't wish to. In addition, I wanted a nice filter mechanism to allow multiple filter facets to stack in a search based on geography, category, payment types, etc.