You get paid out in BTC, you need to measure your opportunity cost in BTC, therefore you must convert your initial investment into BTC to check for your opportunity cost loss.
GAW is counting on the fact that you won't, because BTC is an appreciating asset and your opportunity cost loss will go un-noticed unless you do the above step.
Okay I altered it to have BTC or USD at the current prices. Thanks for help.
Side note:
I have multiple hashlets, but for the purpose of this thread I based it on the 50 mh/s one I have since it is the biggest.
All the names were auto-generated.