One of the problems with marketing and nostr as I see  is that to market you need to highlight features. 

Features to the end user shouldn't be based on protocol, censorship resistance (OK maybe this is important for the edge users), relay function, social apps beyond social media etc. 

Just on social media, the end user cares about how they have a mobile and desktop app, whether their friends are on it, whether they can downvote to see less of the topic, deleting posts, finding friends, bookmarking, new content etc. I know some of these features exist in some clients. But there isn't consistency (nor do you really want it as that's the feature on nostr). But you its hard to market to an end user as I see without a consistent set of features amongst clients (ie if you download damus you can do x but on iris you can't). 

Beyond that, as we know nostr is much more than social media. So marketing could get easier for nostr as the ecosystem of apps grows. Ie it is essentially a decentralised single sign on for many apps. Personally i think an 'app store' which is a directory of PWA's could help discovery of the ecosystem and give people a familiar interface for entering the ecosysten. Think https://appsco.pe/ for nostr. 

I'm.happy to work with someone on this idea and fund it.