There exists a way to tell Xiaomi that, we want 32GB version only.. Once you miss the 32GB version in a fraction of second, then add all the 3 colour variant of 16GB RN3 and DO NOT buy it.. Let it leave the cart till the time expires.. By this way, we can give message to Xiaomi that, we will NOT buy 16GB version till you bring us the 32GB variant in req quantities...
But I am NOT sure, how many people will go with this idea.. Flash sale is HUNGER marketing and let us all convey clear message to them using their own flash sale drawback..