# Airdrop

The Community Airdrop rewards **NFT holders** for their long-term commitment and support of the Zombie TD ecosystem. The program will run for **24 months** from its launch, with rewards distributed **every month**.

* The reward pool for this program is allocated from the **NFT Holder Airdrop pool (12%)**
* Rewards are distributed based on the **weight of NFTs** held by each participant
* To ensure fairness, **two random snapshots** of wallets are taken each month to determine eligible holders
* Rewards are paid in **ZTD tokens** and are **instantly claimable** in the dashboard, with no cliffs or vesting

### ⚖️ NFT Weight by Rarity

The weight depends on the rarity of the NFT:

* ⚪️ Common – 1
* 🟢 Uncommon – 2
* 🔵 Rare – 8
* 🟣 Epic – 20
* 🟡 Legendary – 100

### 🧮 How rewards are calculated

1. Each NFT has a **weight** based on its rarity – the rarer the NFT, the higher its weight
2. Calculate the **total weight** of all NFTs in your wallet
3. Sum the **total weight of all participants**
4. The reward pool for the period is divided by the total weight to determine the **value of one weight point**
5. **Your reward = your total weight × value per weight point**


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