Axie Infinity

Axie Infinity is a blockchain game developed by Vietnamese studio Sky Mavis in 2018, known for its in-game economy which uses Ethereum-based cryptocurrencies. It has been called "a pyramid scheme that relies on cheap labor from countries like the Philippines to fuel its growth." Players collect and mint non-fungible tokens (NFTs) which represent axolotl-inspired digital pets known as Axies. These creatures can be bred and battled with each other within the game. Sky Mavis charges a 4.25% fee to players when they trade Axies on its marketplace.