🚰 Faucets & Sinks
Quick Summary
Faucets and Sinks are two pillar concepts in designing a Game Economy. Faucets are systems that generate currency/resources for players, while Sinks are mechanisms that consume or reclaim those resources to control inflation.
Illustration: Economic balance in games — Faucets (left) pump resources into the system, Sinks (right) reclaim resources to maintain item value on the central scale.
In the system design of virtual currencies, especially for the MMORPG and online Gacha genres, regulating the volume of circulating assets is a vital priority. If the generated resources (Faucets) are too abundant without points of consumption (Sinks), the game will face the risk of hyperinflation, leading to the currency completely losing its exchange value.
1. Faucets (Resource Generators)
The term “Faucet” represents the flow generating resources from the distribution system. This resource volume increases the total wealth of players across the entire server network.
- Passive format: Daily login rewards, stamina regenerating over time.
- Active format: Quest completion rewards, gold dropping from defeating monsters (Loot drop), selling items to system NPCs.
2. Sinks (Resource Drains)
The term “Sink” represents where the money flows out and is permanently destroyed from the server’s circulation chain. This is a restraining tool against excessive accumulation.
- Soft Sink: Buying fast-consumable items (Health/Mana potions), teleportation fees, equipment durability repair costs.
- Hard Sink: Equipment enhancement features requiring millions of gold points to increase one level (with random success rates), Auction house taxes of 5-10% biting into transaction profits.
Role in the Design Loop
A Game Designer must constantly adjust parameters so that the margin between Faucets and Sinks creates a continuous sense of achievement but does not cause redundancy. If the Sink is too large (high costs), the game turns into a stamina-draining grind loop; but if the Faucet is overwhelmingly dominant, the sense of reward will be quickly nullified.