Because earlier the difficulty was more, the income was twice as much as you have on the pool now with low difficulty
It might seem like that but, in reaiity, it can't be true. Difficulty has dropped since March 3rd when the
coinsforall.io pool went down but not enough to explain an apparent 50% drop in income.
Date: 10/03/2021 00:55 - 3872381 - Difficulty: 8.9318 - coinbase: 12.64568656 DTC
Date: 10/04/2021 00:41 - 3919500 - Difficulty: 8.9595 - coinbase: 12.89000000 DTC
Date: 10/05/2021 00:19 - 3955926 - Difficulty: 8.8470 - coinbase: 12.95000000 DTC
Date: 03/06/2021 13:41 - 3985441 - Difficulty: 8.5357 - coinbase: 13.86000000 DTC
You've apparently been led astray by relying on faulty calculations:
I have more than 10 blocks per minute
Common sense should have prompted you to question this figure. Datacoin, as a clone of
Primecoin, has a target block spacing of
one minute, enforced by Sunny King's scheme of continuous difficulty adjustment, so a figure of > 10 blocks per minute simply
cannot be correct.
Feeding bogus figures into a mining calculator merely propagates the absurdity:
mining calculator
Your CPD:12500
Difficulty:8.4189
Include pool fee (4%)Calculate
DTC per day: 100510.967
Daily target block spacing is 60 * 24 which is 1440 blocks, not 12500.
This has misled you into making incorrect assumptions which you unfortunately expressed publicly:
Pool ( dtc.graymines.net) SCAM. 80 percent the pool takes for itself do not mess with this pool
You might gain a clearer insight into your mining income by entering the values into a spreadsheet.
Cheers
Graham