An "ISK Sink" refers to any mechanic where ISK leaving a players wallet is not going into another players wallet, i.e. the ISK is being absorbed or destroyed by a NPC entity.
This causes deflation within the economy, as ISK leaves the universe, but the amount of goods in it remain the same (or increase).
- Purchasing from NPC Buy-Orders (Trade Goods, POS Equipment, Blueprint Originals).
- Purchasing Insurance (but not claiming).
- Sales Taxes.
- Office Rental Fees.
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