One thing you might do if you think their payments are unfair is to get an estimate. The following link:

https://www.coinwarz.com/calculators/bitcoin-mining-calculator/?h=10000&p=0.00&pc=0.00&pf=0.00&d=708659466230.33200000&r=12.50000000&er=2525.54000000&hc=1400.00

...is a mining calculator where you can see just how far off center they might be. Mining is risky even with well established companies.