Why the hell should Larian Studios get your money?
Easily, their honesty with the community. Telling their games lacked quality due to financial constraint is a big + for me. I couldn't find a developer so interactive with its community. Look at EA. Recently, the CEO stepped down due to his marketing skills (or extortion skills).
By the by, EA implemented heavily on DLCs. I think we won't see much of DLCs for this game except if it is related to the game's storyline as swen have stated here
http://www.youtube.com/watch?v=ghsiPPJN3rE @ 10:45. If anyone is interested in the modding of D:OS you should also probably go to the link I've provided.