If yobit could guarantee the payment every day for at least 365 days straight that would be 72% annual interest which is way more than any banks offering right now, at least in my country most interest rates are around 23% max but they are banks, yet what other exchanges or cloud mining services which they own their own mining pools as well are offering is a very good deal IMO.
YoBit is a very bad place for investors within that area since their support is really lacking compared to most Bitcoin exchanges (Poloniex, Bittrex, etc). If something were to happen then all that Bitcoin invested would get lost within that website and YoBit is known to have downtimes here and there.