'nerd nerds' don't know what they are doing in terms of presentation or communication.
If 'nerd nerds' are 'hip' it's completely by accident.
I also think 'nerd nerds' just say whatever, meaning that occasionally they will say something un-PC, or lacking in empathy and be 'pushed out' for that reason.
There was a time (and some people are still like this) where utterances didn't imply an ideological alignment, it's just something that's said.
In 'All Birds Culture' everyone is careful how they communicate.
I'm sure there are some nerd nerds at AirBnB and frankly not everyone in All Birds Nerd culture is the prototype either but the 'mainstay' at AirBnB would be All Birds Nerds.
Someone who wears a 'Metal' T-shirt, completely un-ironically, because they like Metal, and wore it 5 times without washing it, because they forgot, and have disgusting greasy sideburns just 'because they like it' ... and an article of clothing made out of snakeskin ... that's probably a nerd nerd.