I play in two worlds. I'm in chapter 14 in one and just short of finishing chapter 18 in the other. I seldom buy diamonds in ether one but continually get the 100% more diamonds promo only in my chapter 14 world.. I have bought diamonds on occasion in both worlds but most often to pick up the end of an expansion promo. I'd probably buy it if it was offered in my chapter 18 world so where is the marketing emphasis?