- Requiring power up is core concept of Steem, before you can use any app, isn't it. And improving gamification and user retention brings more users in and encourage them to power up more. 2. Use case for STEEM as mentioned in above comment added to recent update of Surfer that allows people to purchase goods (ESTM) with STEEM and SBD. More goods will be added of course but it already exists.
RE: Delegation Renewal Recommendations to Steemit