Sort:  

I reckon this post will be worth a read for you, but you transfer some steem or SBD to dustsweeper with a memo nominating the account you want to top up (no memo means your own account). That balance is then used for the upvotes.

https://steemit.com/dustsweeper/@dustsweeper/dustsweeper-faq

Don't forget to tag two other steemit accounts to get yourself an entry into the draw!