I have been using minnowbooster.net for some time now, and i must say that I am impressed with their service.
For those uninitiated, minnowbooster lets you sell your vote for SBD in return. Your voting power is used to upvote others users content, and you earn SBD based on your VP.
But the real advantages are you ability to lease your steem power to other users and earn a dividend. Usually the APR is about 30-35%, so it is not insignificant. You also have the opportunity of send SBD to minnowbooster, along with a post that you have written, and you will instantly get upvoted for more than you sent in SBD, because other people have sold their voting power to the site.
Below is a full list of ways to earn money from this site and other ways you can benefit from it.
Buy upvote SBD when you create a post - Earn an instant return
Lease SP from market STEEM - Increase your vote strength and curation rewards
Delegate SP to market - Earn daily STEEM dividends
Invest STEEM in MinnowBooster - STEEM Earn daily SBD dividends
Delegate SP to MinnowBooster - STEEM POWER Earn daily SBD dividends
Sell your vote to MinnowBooster - VOTING POWER Earn SBD share of sells
They even have a referral program, so if you havent signed up, use below link, and earn extra rewards.
https://www.minnowbooster.com/referral/559516