We're doing this with frontline workers in Southeast Asia in mind. Nostr as it happens is a very good parts bin for communications tools for frontline workers (factory workers, drivers, hospitality workers, etc.) You can put together something Nostr-based that is much more attractive to the enterprise IT team than are the frontline licenses from Microsoft 365 or Google Workspace. But these are isolated, centralised deployments, not relying on any of the decentralisation aspects of Nostr, more the raw simplicity, also zaps are a good way to increase adoption (the big problem for all these companies is adoption, it's *always* adoption.)

Then it's just knocking on doors and old-fashioned B2B sales.

For a Nostr client in the wild this would be a pretty heavy technical lift, and also the question of how to cover infra costs without B2B revenue to offset (Nitro enclaves and zk-proving servers not so cheap). You can't really ask users themselves to pay to sign in with Google.