Fine, calculations. For every ten workers you put on ... you get ... Mining - 542 Coal = 542 * 231 coins = 125,202 coins + gems = 75,202 coins profit Fish - 440 Tuna + 131 Swordfish = (440 * 121 coins) + (131 * 470 coins) = 53,240 + 61,570 = 114,810 coins + extras = 64,810 coins profit Flax - 1250 Flax = 1250 * 90 coins = 112,500 coins + herb seeds = 62,500 coins profit Wood* - 892 Maple Logs + 8 Nests = (892 * 44 coins) + (8 * 3464 coins) = 39,248 + 27,712 = 66,960 coins + seeds = 16,960 coins profit Therefore, Mining is most profitable, followed by fish. Sure, you could get a lucky tree seed, but I'd rather get a guaranteed profit.