RE: Understanding MinnowBooster : How to Use MinnowBooster - 7 MinnowBooster Services You Should Know About!

You'll get 37.5 % of 1.33 as SBD and 37.5 % of it as SP while the rest of 25 % will go to the voter (curator).

37.5 % of 1.33 is 0.499 SBD. So, you get your SBD back with som SP as well. Overall not a loss, if not profit. It Steem's price rises after the vote, you get more SBD because $ value increases, and vice versa.

Do read my recent post on reward distribution. You need to and it will help.