Windows Phone Mango will not support in-app purchases
downloadable content and microtransactions", but it looks like those features won't be hitting Windows Phone with this next update. In the comments of the Windows Phone Developers Blog post about the recent App Hub update, Microsoft employee Todd Brix put the rumors to rest. Brix said that in-app purchases was a feature that was a high priority for the Mango update, but it "didn't make the cut."
For developers, this is one fewer opportunity to make money from users, but for users this delays the inevitable surge of microtransactions that will come from in-app purchases.