I don't think this is a very effective approach to making a goi or to using the idea and brainstorming forum.
The idea itself is way too vague - what about the number 71 would be important to this cult? What story do you have planned about what that makes them do, and how do you plan to show that story unfold in your writing? You don't have to have every single detail planned already, but having some kind of rough outline would be a good place to start. With a starting point this broad, it cones across like you're asking the audience to make up your entire article for you.
With regard to a goi that takes off and gets its own format, the best (and from what I've seen, only) way to make that happen is to write articles about them that people will enjoy and want to see more of. Just wanting the goi to be a thing, and writing with that as the goal, doesn't work. So you will be more likely to have success with your article if you think of it as something that needs to stand alone, and focus on making it a complete story in itself. What kind of article do you want to make about this cult?
