In 2020, US online casinos introduced no deposit bonus codes as a popular incentive for new players. These codes allowed users to claim free credits or spins without needing to make an initial deposit, making it easier to explore various games and platforms. Players could use these bonuses to test their luck and experience the thrill of online gambling without financial commitment. However, it was essential to read the terms and conditions, as wagering requirements and game restrictions often applied. Overall, no deposit bonus codes provided an exciting opportunity for players to engage with online casinos risk-free.