There is no Musing exclusive tokens here yet. Though I'm sure the developer is working on that direction in tandem with Steemit.inc's SMT project.
The money you get from people upvoting your answers and questions are your Steem money.
Posts and comments on Musing.io gets published on the Steem blockchain and can be upvoted like regular steemit posts and comments. Just wait the 7 days to get your rewards locked-in and claim them from your Steemit or Vessel wallet app.