Here are my answers:

1. Easy to use especially to those members who are not techy persons. In other words user-friendly.
2. Increase visibility of steemit post and eventually translate to upvotes which what we needed the most to earn.
3. It creates double earning scheme. You earn sbd/steem/sp and at the same time Superior coins. Hitting two birds with one stone.
   Upvoyed and resteemed by rubelynmacion