Spending in-game levys
The key to getting great deals of currency for your kingdom is to use your levys as frequently as possible. Your tax levy, grain levy, and recruitment all needs levys that regrow overtime. Whenever you use a levy, you will get that resource plus grow your kingdom a bit. Levy regrow with time by themselves, and they just require a number of minutes prior to they are back at max. Make sure to sign in typically to invest your levys!