You can use those SBD to buy votes from a bot like this article. Be careful buying votes as sometimes you can loose money.
Or you can hold a contest like i am here https://steemit.com/contest/@royaleagle/meet-a-minnow-sbd-giveaway
Or you can change them into Steem in the internal market, if you do be careful to make sure the price of Steem is less than the price of SBD.
Hi and thanks for stopping by...
I don't think buying of votes is something I'd want to do now.
However, i think I'd do well to check out the contest. Cheers!