The tooltip reads: “Increase the Gold income from Traders and Trade Ships by +30%”
This is accurate for Traders. However, for Trade Ships, the return is consistently 10% less than the listed percentage.
Numbers from most recent tests:
Test 1
Trade Ship Gold Income: 69 → 83 (20.28%)
Trader Gold Income: 110 → 143 (30%)
Test 2
Trade Ship Gold Income: 92 → 111 (20.65%)
Trader Gold Income: 110 → 143 (30%)