I know musing io from a friend in WA group. I am trying to sign up with my steemit account. I tried to answer some questions. It turned out that my answer got upvote, and the upvotenya value integrated into my steemit account. This makes me more motivated to answer other questions. Musing io provides a challenge to keep digging knowledge to answer questions. This is very interesting for me, besides adding knowledge can also benefit. I think musing io is nice and easy to do