Moon Labs auto-staking cards are a limited collection of 500 NFTs that rewards holders with passive ETH rewards derived from a portion of the native contract tax. Two percent of all transactions are sent to a pool which is then distributed between holders. Rewards are distributed linearly based on how many NFTs you hold, so the more you hold, the more you earn. There is no need to stake, simply have the NFTs in the wallet where you want the rewards sent.