Okay, now that I've been playing the spire for more than a month, I have to say, I've completely lost my fear of losing diamonds. There has never been a week where I lost more than I gained. We have a good group of players who get either bronze or silver, so perhaps others who don't have that would not get as far as I do. But if you have a decent group to play with, the Spire is a net gainer. You just have to remember to withdraw anytime you didn't get a good mix on the first try. Go for at least three of five (or four of six) that say "nobody needs them" or who have gotten what they wanted. That works for me. I once had to withdraw 5x, but that was only once and it was well worth it.