: Use commercial buildings to exchange silver keys for silver chests. Upgrading buildings to Level 7+ increases your silver key payout significantly.
: Invest in multi-use buildings where people live and work; these generate a high volume of cash. Commercial structures like banks, restaurants, and spas also offer some of the highest payouts for gold and silver keys. City Island 5 Tycoon Sim Game - Free Hack
: You can turn silver keys into gold keys by queuing low-cost buildings like kiosks or water parks before ending your day. : Use commercial buildings to exchange silver keys
: Occasionally, the developers release gift codes that provide free money and gold for a limited time. City Island 5 Tycoon Sim Game - Free Hack