To be precise, Yieldnodes doesn’t offer APY – it provides ‘profit share’ services. On the other hand, the platform might face some problems with sustainability in the future. With an increasing number of users joining the platform, staking rewards through masternodes to maintain a 10% monthly profit doesn’t seem possible. Although, the developers have talked about working on a feature called ‘DECENOMY’, which means using coins with an extremely low market cap to maximize returns.