Merchants could get even just a little exp from things they do. I know
merchants aren't intended to be first guild you join when you start the game,
but at least give them a small chance. That'd help when reincing and trying to
get exp back, and newbie merchants could get slowly their skills higher
instead of killing bunnies. They could get at least as much as from bunnies,
considering that stuff they do take quite long time to be ready. Heard that
some people get even more money than merchants just by killing things, so
wouldn't hurt if merchant gets 100-500 exp from refining stuff and mining and
other stuff.