Ok so common spot at 10nl and below.

Hero has a range on the bb.

Folds to unknown villain in MP, who openshoves 100bb. Folds to hero.

What is villain's range? And, consequently, what should we be calling?

And does anyone think these guys are making more money with their KK+ than I am?

I'm trying to understand if they're making a mistake or not. Intuition tells me they are losing value, but I have no idea how often they need to be called before it becomes a better move than simply raising.