Have you ever bought a piece of plush that you just KNEW would gravitate children to your cranes, only to watch its revenue decrease? You move the crane, or you adjust the strength, but still no one wants to play for this plush.
Here's a simple trick...no science behind it, no real reason it works, but take the crane plush out of the game and move it to the counter. Guarantee that same plush that decreased your crane earnings will work at your redemption center...sometimes to the vision you had when placing it in your crane!