I have an MPOS + stratum mining pool and I have 3 people who did a group buy on mining gear. 1 paid 50%, another paid 30% and the 3rd paid 20%. All altcoins and GPU mining gear.
How could allocate percentages per user?
With a calculator and a time interval of your choosing
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I am trying to figure this out as well, there has to be some kind of easily configurable payment automation system