I spent an hour on the phone with them yesterday, there are no viewer accounts. Basically I have Server, but it needs a named license to view. Named licenses are 1k down, $200 per year. To get a viewer account or to embed the content elsewhere for viewing I need a different kind of Tableau Server (core-based), of which there is no mention on the sales or pricing pages, but it starts at 72k/yr (non-profit pricing).

My completely misguided understanding was that I would pay for Desktop for the analysts, and Server was where folks could view the stuff. I was wrong. So everyone is now double-licensed, Desktop to do their work, Server to publish their work, and no-one but the very same analysts can actually look at the dashboards unless I add $1k licenses for everyone who needs to see data.