More of a little hint than a guide really. I just calculated (based on average prices on baskets, HWP and marble on the newfoundland server) at what level buildings, in the gold production chain, it starts to be worth using the badge-buff. And here are the results:
Code:
Coins pr. Gold Ore Coins pr. Gold Ore
using baskets using badges
level 1 0.375 0.170
level 2 0.438 0.404
level 3 0.458 0.546
level 4 0.469 0.641
level 5 0.475 0.709
So at todays prices it doesn't pay off until level 3 and after that it's pure gold