Yes, I had one the other day. It doesn't appear to be up on Council Room yet, so I don't have the exact data, but here's the gist:
I had a 5/2 opening--I don't remember my 5, but I picked up Embargo on Turn 2. My opponent goes for Black Market with his 3/4 opening. I looked at the Black Market deck, saw Tournament, and panicked. I did NOT want my opponent pulling Tournament! Impulsively, I Embargoed the Provinces, thinking that might help slow a Tournament strategy... and then I notice that Fairgrounds are in play, which are of course perfect for a Black Market deck. And I've sabotaged the Provinces! I hurry to grab all the Fairgrounds I can, and pick up my own Black Market.
In the end, my opponent's Fairgrounds were worth way more, but we split them 5/3 in my favor. I buy a couple Provinces (despite the curses), and eek out a surprising win.
But man, we practically bought out the Black Market deck.