Well, being a person from marketing, I say it's foolish to try to let it just be without vision/strategy. Some plan matters because it determines how you will present this protocol, how you will reach and communicate with the audience etc. For example, avarege person has no idea what is client, protocol, private key etc. Marketing plan matters, because if the goal is to become mainstream, someone needs to render complex technical terms into 3d language that people resonate with. If you let it just be without any plan + the design and user experience can't compete with popular platforms, I am afraid it will stay a thing only for a small bitcoin group of people. Nostr have potential for much more, and bitcoin will become massively accepted   if nostr becomes mainstream. 

 There’s a truth to this but bitcoin doesn’t have a marketing team and has literally gone from the white paper to the White House(figuratively speaking) in 15 years. 0 to 89k. Powerful ideas spread like wildfire and the open market has a way of deciding what it wants to participate in. That being said, it’s likely that we’ll get to a place where clients and businesses built on NOSTR might start some form of marketing/promotional campaigns but they’ll need to be incentivised to do so. NOSTR will just be the rails on which we ride on. In the same way that we don’t know how the internet works but we know how the things that are built on the internet work.