I suppose you need to ask, "What is the point of promotion?" If you're just trying to get to a particular niche audience and you know they're on a particular channel, then go there and start interacting. Defining marketing isn't going to get people to look at your product and producing your messaging in a perfect bubble is a surefire way to keep you in obscurity. I suppose my tactic is creating a shortlist of 1000 ideal customers, reading what they read, figuring out their needs, and then after all that research -- approaching them humbly with a request to demo.