When conducting a transaction with a token on the Cardano network, a minimum amount of ADA is required to accompany the token. This requirement is rooted in the technical structure of the Cardano blockchain. For a detailed explanation, refer to the official documentation.

Essentially, when we process the return of your token or NFT, it cannot be sent back without including some ADA. This is why you will receive 2 ADA along with your token(s) or NFT, ensuring the transaction adheres to Cardano's network protocols. Consequently, the effective cost of the transaction fluctuates between 15 to 16 ADA.