I tried it and got an $8.85 upvote. This was with minnowbooster at 56%. I did this on a post that is almost ready to pay out.

I like the idea that this helps my curators too. I think I will do it on day 6 maybe. I only post 3-5 times a week anyway right now, so I'm within the limits of spending $25 on it.

I'm already using delegated sp from minnowbooster and I am thrilled with that result. I haven't tried any of the other services. Thanks for the tip about this one.