Here you can see a detailed explanation about stacking in MEW: https://bitcointalksearch.org/topic/m.21934703
One thing I think it could be more clear is when stacking and minting for the complete 90 days compared to stacking and minting every 3 days. Which of the 2 ways rewards more tokens because one would expect to have a higher reward if we don't touch the tokens for 90 straight days compared to every 3 days.
Curious to see whats the process.
The more frequently we do the pos mining, the more postokens we accumulate
For example:
Blob has 100 tokens, he hold them for the whole first year and mine every 3 days.
Alice has 100 tokens, she hold them for the whole first year and mine every 90 days.
If we use 100% to do the calculation:
Blob will receive 100*((1+100%/365*3)^(365/3)) ≈ 271 POS
Alice will receive 100*((1+100%/365*90)^(365/90)) ≈ 241 POS
You can see that the effective interest rate of first year range from 140% to 170%. The totalSupply will increase to at least 2.4 Mil after the first year, this is bad for the whole system.
But if we use 77% to do the calculation:
Blob will receive 1000*((1+77%/365*3)^(365/3)) ≈ 215 POS
Alice will receive 1000*((1+77%/365*90)^(365/90)) ≈ 200 POS
How do we do it for 90 days though?
Hold your POS for 90 days and then start pos mining, you will get your reward.