Awesome site! You could easily monetize with just placing even a single AdSense ad on the site. An app might also be useful in monetizing. Is this a custom site? Curious what you used to make it.
It's made using Kirby CMS and a custom PHP script for counting the likes (horrible code). The overlay offset effect (visible only on desktop) I've wrapped in a plugin and put on github here: https://github.com/miloszfalinski/jOffset
I know it sort of goes against reason, but I'm tired of sites riddled with ads, so was hesitant in making any sort of move. Only option I'd be considering was approaching good android developers myself in hope for some ad based sponsorship. That way quality wouldn't suffer, I'd get something out of it, and users could find out about actually good apps. Then again, monetizing was never a goal, and I'm slowly running out of nice things to add, so I'll probably keep it as it is.
Pretty much. Buddy of mine runs one of the most popular wallpaper sites and the ads make pennies on the dollar. You can't really monetize a wallpaper site at all (especially if you aren't the one making the wallpapers).