Now that you mention it, I did know it was optional. Obviously I was forgetting AND ignoring the text though...caught in a moment. In addition to the crazy set up that was kinda unfamiliar territory for both of us, we were in a hurry, which I think contributed to a few of our dumber mistakes. At one point my opponent swindled herself and turned her golds into golds instead of grand markets, which she realized was possibly a mistake afterwards (maybe not, it would have given me +buy when I possessed her).