My priestess is not using the Light to make a profit, however she views it as a assured guarantee of her safety and a great protection for when things go south (whether because she is 'insuring' her card games of 'chance', or digging for artifacts in enemy territory). She does want to make a profit and become rich (and is rather materialistic), but her main drive is wild adventure. http://bit.ly/h3bAmt

Basically, my point is.... I think though greed certainly plays a part in the goblin psyche, there is a LOT you can do with it. I find it fun to figure out where greed and ambition ranks in my goblin's lives.

http://bit.ly/hBfds2

That's really cute, a goblin who has moments of "weakness" where she puts other peoples's needs over her own (or moments of putting other needs of her own over greed) and feeling shame for it.
http://bit.ly/hKQInq

I think the important thing is that for most goblins, greed is a means to an end. Being wealthy for its own sake doesn't get you much other than the hatred of those you screwed over on the way to the top (refer to Gallywix, for example).
http://bit.ly/hKQInq