Mindcraft model would make way more money. Besides, I do not think Jordi is in this for the money.

Far as the devs, would be much easier - straight forward. Their current client/server build is solid with 100 connections, so really no changes/overhead there. All they would need to do is add a config tool to the server piece and provide it as a download/install with a mySQL database as a requirement on the hosted server, etc.