Headscratchers / Batman: The Long Halloween

• I don't know how the original comic book went but how exactly did Carmine convince Poison Ivy(whom if I'm not mistaken is usually a misandristic eco-terrorist), to drug Bruce into giving him the Wayne Foundation for his money laundering? What did he offer her in exchange for this besides making a rich and powerful man her mind-controlled boytoy(which I doubt was enough to sell the proposition to her)?