Are you trolling? Market square is fantastic. And forager has lots of applications too, as non-terminal +buy and trashing are fairly rare. I'd say it finds a frequent home in engines. And if there are alternate treasures, and/or incentives to trash treasure (remodel, contraband), look out, it just gets silly.
No I'm serious here. Market square is good in engines, but useless in Big money, slogs or rush strategies. And forager is usually used for trashing curses, estates or coppers right? For coppers it's just a +1 action, which is worse then loan. It provides money for curses and estates, but most of the time only $1. Loan can't be drawn dead, while this can. Forager will become useless after estates and coppers have been trashed, while loan will provide money still.