50 coins? Not with diadem.
Not with the broken HoP either, unless you're counting multiples played. But if you had a kingdom with lots of villages, then it's possible to get $50 from a bunch of Diadems.
Anyway the point is that the broken card was most likely a card that looked at the number of Action cards played previously, which led me to believe that it was either Diadem or HoP. I went with Diadem in my mind because I thought I read somewhere that it was tested out as a supply card somewhere but failed due to how it would be really good in some kingdoms and really bad in others.