I think you entirely missed the point that there is a fixed BTC per unit of time produced by the network.
LOL. 200G/s is not The Network! The Networks is cranking happily at 10+ Thash/s.
Lets see now, what happens to 100% of 5 MH/s (coupon) when diff changes
A. 100% of 5 MH/s at difficulty 1
483177 will get you ~ ฿0.023736 per week
B. 100% of 5 MH/s at difficulty 1
583177 will get you ~ ฿0.022236 per week
C. 100% of 5 MH/s at difficulty 1
683177 will get you ~ ฿0.020915 per week
But...but... the fixed BTC per unit of time.
Oh now! If difficulty goes up, your 5 MH/s will earn you less coin! But...but... the fixed BTC per unit of time!? Difficulty is not calculated only form your personal mining speed of 5 Mh/s. Network, as a whole, got faster, diff goes up and you earn less because you are still at 5 Mh/s.
Is that news to you?
And just to make sure, you do not miss it, current yield (% what you will earn) is calculated "interest payment"/"price
you paid for the bond".
Lets keep it simple and not get in to YTM, annual returns and other similar calculations.
If you buy the bond at 1 (par) that promises you 0.023736 per bond in time frame X, you will be earning 2,3% (yield) in that time frame (week, month, year).
If I buy that same bond (same coupon) for 0,75 I will be earning 0.023736 per timeframe like you but my
yield is way better - 3.1648% in that time frame.I invested less, to earn the same income.
As you see, Gigamining has not promised us fixed div but what ever 5 MH/s can do at any given difficulty.
And for fuck sake, those are actually not bonds but more like Floating Rate Notes (FRN) with a variable coupon that is linked to a mining speed X.