ROI

Gold reward will drop out in a random range for each NFT level

With 100% SP:

	NFT 1-star	NFT 2-star	NFT 3-star
Captain	8 – 10 Golds	40 – 50 Golds	80 – 100 Golds
Quartermaster	7 – 8 Golds	35 – 40 Golds	70 – 80 Golds
Sailor	6 – 7 Golds	30 – 35 Golds	60 – 70 Golds
Worker	5 – 6 Golds	25 – 30 Golds	50 – 60 Golds

$N(x) = The number of gold * (100-N(x-1)*2)/100$

N(x): Gold received on day x

N(x-1): Gold received on the day before x

EXPECTED ROI:

Captain: 11-14 days

Quartermaster: 14-17 days

Sailor: 17-20 days

Workers: 20-27 days

ROI CALCULATION