There's precedent out there - Canonical. They've created a buisness model for a Linux distro that works...how? Provide a great product, make it free for end users, provide additional features / support tailored to businesses, and charge those users for that upscaled support and product.

Thinking something similar to Damus (and Nostr in general) might work?

Think "Nostr for my business / comnpany" - maybe internal corporate relays for internal communications--scale it for business, but (since it's free) users already are familiar with it...

Have to think a "private" Nostr might have legs...add in business NostrNests, or private Flare videos - and I'd think businesses might want to pay for that?