Miles Booster on non-VS flights?

Has anyone done this and lived to tell the tale?

I'm talking about boosting miles on redemption bookings on partner airlines (not VS metal, not VS codeshare). Specifically, I see my NH flights are eligible (apparently) for Miles Booster. Is this just a mistake, or are these eligible flight to boost?

NH.png (94.57 KiB) Viewed 1355 times

Surely that can't be a thing...

No Mistake.
I've done this twice with the current 30% boost. A mix of VS /SAA on the first trip and VS / BA on the 2nd trip. All paid for and receipted with an acknowledgement of the miles purchased

I just used it on a short Delta connection to and from a VS flight. It worked and miles were collected.

Awesome, thank you everyone! You learn something new every day!

One more thing: can someone remind me how to change the currency of the Miles Booster transaction (I know it's handled by points.com)? GBP always gives a better deal than USD. I remember I did this once, but I've forgotten!