(Unnamed 2)
Treasure-Attack $4
Worth $1
When you gain this, each other player may gain a curse. If no one does, gain a Gold.
This is almost always better than IGG?
This is much worse than IGG, because it lets opponent choose whether it's IGG or not. Giving the opponent a choice between two options is weaker than either of the two options alone would be. For example, Torturer would be super-broken if it had either attack option locked in; it's balanced by letting the opponent choose which attack is preferable.
But you get a nice gold on top of it, it he doesn't, which is... pretty nice .
Gaining a gold and Dan effective copper is about the same as gaining two silvers. Which, isn't awful for four dollars, but it's not beating down the doors either. And this card is strictly worse than just gaining a gold, because your opponent has the option to make it ill-gotten gains instead.
I guess the general point I'm trying to make is, if you take an effect that's about on power level for the cost, but give your opponent a choice between that and another really strong effect, the card looks really strong, but actually plays weaker then the weaker of the two effects.
If you play Magic the gathering, a good example is the card titled vexing devil. It's a 4/3 creature for a single mana, but it gives the opponent the option to take for damage to have it be destroyed. For damage for a single mana but it gives the opponent the option to take for damage to have it be destroyed. For damage for a single mana is a good rate, and agreed to that size for a single Manna is absurd. But because the opponent has the option of which one would be better for them, the overall card is weak to balanced, even though at first glance it looks ridiculously broken.