Lots of ways. The primary way is in-app purchases; people buying Atlas Bucks and Legendary Parcel Upgrades. There's also the Atlas Explorer Club, our subscription service that lets players earn more AB from the daily login ladder. Brands pay us to show their offers on the Atlas Merchant Platform. We have some third party partners who pay us to show players games in the Arcade, hotel stays in Travel, and surveys in Surveys for Bucks. 

We don't really make money from ads, though; we break even. The money advertisers pay us to show players ads gets earmarked for rent redemptions. When a player redeems virtual rent for real-world currency, the money we send them comes out of our ad revenue.