Napster-the-company is not a peer-to-peer client, but they may be a server of search results. Napster-the-software may be both server and client, but software can't be a "service provider", which has to be a person or corporation (as "service provider" here is a role a human or company plays, not just "a thing which provides service"). My attempts to tease out what that paragraph means have been futile.