It is most likely that we never will hit a full 960k in one day, because everyone will size down there coin blocks so that they won't hit the 1k limit....
What does this mean?
Should I resize my blocks BEFORE they hit 1000?
there is a maximum stake reward of 1000HYP per block, therefore the higher difficulty goes the longer your block takes to stake, and the more age your block grows the more chance you have of hitting the reward cap.
so in answer to your question, block sizes of around 2-3k HYP each are good right now, any more and you will hit the cap more often than not and any less and you risk losing compounding. Do not resize blocks if you see them getting towards the max reward as it will reset the age of them and you will have to wait another 8.8 days for it to be eligible to begin competing to stake.
Nice work on that graph presstab, should help some of the naysayers see the concept behind the long term inflation control