Nice to meet you!
Oh, I agree. It's a pretty bad card that rarely works out. I think I've gotten it in only one or two games, either in a slimmed-down-with-Spice Merchant Torturer deck where I had basically won the war and in one warehouse-TM game.
My point was more of a quibble (an edge-case if you will) -if the other cards in play are great hall, scout, fairgrounds, farmlands, vineyards, coppersmith, contraband, tunnel, feodum, you might want to grab treasure maps over straight BM. It gives you only a tiny edge, but it is an edge, so the article is a bit off. That's all.