The link would point to a relative site to the niche. The reason I am NOT considering it a blind link (and would allow it) is because the surfer knows that when they click it they don't know where they will be going. The link becomes a game to them. Let's click it and see where we go.
It's not fooling the surfer. It's like Googles I'm Feeling Lucky button.
Hugs,
Danielle