Stop Using the Cup of Coffee vs. $0.99 App Analogy
If I see something that is both "free" and "in-app purchases", it already <i>greatly</i> reduces the chance I'll even bother to download because <i>so damned many</i> of these are just <i>terrible</i> experiences.  On the off chance I bother to look one step further and preview the "top in-app purchases", I usually see something totally unsurprising like the absurd "$9.99 gem bags" or whatever.<p>Please, please just start charging for apps again.  I <i>specifically</i> search for "pay once and never again" apps now.