Same thing, different terminology I think. This is definitely for smaller, private (or public) communities and groups on nostr. Small depends on how much data and bandwidth your team uses. If it's under 5gb of data between you all then thats alot of memes and content to host for $0 - as well as the relay. I think total cost would be the price of the domain as you could spin these up almost indefinitely afaik. And you don't have to pay for a domain either 😁