If you are not whitelisted i think its somewhere around 2.3x multiplier and if you are whitelisted its around 2.4x . Compared to any other promotion sites whitelisted minnowbooster votes blow the competition away.
You are already using buildawhale there really is not much different from them its just you get more value of the sbd you send when you use mb. give it a go and have a look for yourself