158 App Empire But if you ever decided to do a FreeAppADay promotion and make your paid app free for a limited amount of time, you can jump on AdWhirl and turn on your ads to capitalize on your temporarily free traffic. This could make you thousands of extra dollars. You have to give yourself that flexibility to monetize all your apps at all times. As for how to integrate AdWhirl, like with your nag screen and promo pages, your programmers need to be experienced with this. Let them handle all the details and check that everything is working before you submit the app. AFFILIATE MARKETING Affiliate marketing is relatively widespread on the Internet and many people are still making lots of money with it. The basic concept is that if people have something to sell online, they give you a certain percentage of any sale generated by customers you brought to their website. You (the affiliate) are getting a commission from sellers for connecting them with buyers.