Musing.io is simply a question-answer finding platform like Quora et al. While other platforms don't reward the user who asks a question or the one who replies with answer, musing.io reward both with upvotes without any delay.
Some answers can be simple one and some other might be complex. It all depends on the way question was asked. If someone asks an irrelevant or incomplete question, the answer received might be likewise.
I think musing.io do not upvote answers manually. Rather it upvots answers automatically by the help of some algorithms. All the answers related to a question do not come in a single instance. They come one after others maintaining a time gap between them. So, it is clear that it can compare every answers only after every answer is received. Only then it can chose the best one. It takes lots of resources to evaluate and verify every fact and data. It will take considerable time and lots of efforts to implement such a complex system. That's why musing.io upvotes answers as early as possible after their posting. In this process some bad answers might get upvote from musing.io. However, these types of instances are very rare. Musing.io is a revolutionory platform which is changing the way we used to seek our answers.