Maybe a bit pedantic, but, assuming I did the numbers right, which is not a given:
750% is the nominal rate = 2.05048% per day (not including compounding)
But with daily compounding 1.0205048 ^ 365 = 1675%
So absolutely optimal staking should produce closer to the higher number...
Until the 960,000 coin/day Hard Cap kicks in and the returns start declining gradually.
You can only compound at 8.8 days at the earliest:
750*8.8/365 = 18.08219% per 8.8 day period,
1.1808219 ^ ( 365/8.8 ) = 986.3068
100*(986.3-1) = 98530% a year compounded
That sounds like a lot! Let's sanity check it:
I have 1000 HYP, which I will optimistically assume stake after 8.8 days like clockwork, yielding 18% every time, reinvested:
day 0: 1000 HYP
day 8.8 1180 HYP
day 17.6: 1392 HYP
day 26.4: 1643 HYP
day 35.2: 1938 HYP
day 44: 2287 HYP
day 52.8: 2700 HYP
day 61.6: 3185 HYP
day 70.4: 3759 HYP
day 79.2: 4435 HYP
day 88: 5234 HYP
Three months, and already 420%, I'll skip:
day 132: 11974 HYP
day 176: 27393 HYP
day 264: 143370 HYP
day 361: 885446 HYP
In a year, the best possible staking (which is quite unachieavable since it requires perfect compounding by staking each time at 8.8 days) gets your stash from 1000 HYP to 885k HUP. That's about 88400%. Close enough (4 days missing, half a stake period!).
In the last week Money Supply grew:
30,952,405
3,397,835
-----------
34,350,240 = 9.757%
But optimal compounded = 1.0205048 ^ 7 = 15.267%
So "staking efficiency" is only about 64%...
Many people are moving coins, staking sub-optimal sizes, offline, etc
In a week, the optimal rate according to what I said above is 0.18 * 7 / 8.8 = 14.3%. I'm actually not sure whether this number of yours makes more sense here. Close enough anyway.