Hi all, I am new to TouchArcade and it looks like a great community. I have been a mobile developer (Android, iOS) for a few years now, and have some apps in the market. One problem that I have come across as an indie developer is the high expense of marketing my apps. Buying ads is simply too expensive. Chartboost Direct Deals Marketplace are a good place to meet other devs and do a direct deal like trading impressions or clicks, but you can only trade Chartboost interstitials there. What about banner or native ads, or other ad networks like Mopub or Admob? So, I am working on a website where developers can connect and directly trade their unused ad space (impressions or clicks) for free. So, please take a look at www.mangothink.com and sign up, and let me know you think! Thanks.