A lot of traffic is also coming from mobile users. Removing ads on mobile isn't always the best practice depending on what type traffic your site aims for.
WebFlake, for starters, is more and less catered to the PC users due the focus on downloads, so not a whole lot of people will browse the site on their mobile. But if you just run a community without the focus on downloads, you might want to keep the ads - even on mobile.
Just saiyan! :)