So you'd need mods who (1) came over, (2) believe in the platform, (3) believe in the instance, (4) want to do custom CSS, (5) know how to do custom CSS, (6) are willing to put for the effort for a readership that's still fairly small, and (7) feel that the odds of a change that will break their CSS are low.
That's a tall stack of filters, and you may not have a lot of company yet on the other side of it. /m/neverwinternights looks really nice, though. Well done!