You can actually do i think 11-12 letters today, so you could do:

insurance•nostr

and things like that already.  rules allows a "spacer" character, which is like a dot.

Gonna come down to what the future clients support.  But it ought to be the first fair system that is going.  There may be some grift and token sales involved, knowing some folks around, which would lead to competing names, which is bad for nostr.  However, often how the politics plays out. 

 the 11-12 characters thing sounds like a limitation I heard about in the current ordinals approach to a decentralized namespace… is that what you’re referring to or is there an 11-12 character thing in Spaces? 

 Runes, which is different.  Link below I think you'll like, if you havent seen already.

Runes reduces the namespace by 1 character every 4 months, so it's fun gamification.  In 4 years the good names will be available.

Spaces has auctions, which is also gamification.

https://public.bnbstatic.com/static/files/research/the-future-of-bitcoin-2-tokens.pdf