They could be making the money back on Ad Fraud. Perhaps the images and files they provide contain some kind of tracking script. It's easy to imagine giving someone some JS code to paste in instead of a simple image link.
Also this could be just simple fraud. Freely acquiring others IP at no cost, and then almost giving it away because your Cost of Goods Sold is something close to $0.00.
Comments
They could be making the money back on Ad Fraud. Perhaps the images and files they provide contain some kind of tracking script. It's easy to imagine giving someone some JS code to paste in instead of a simple image link.
Also this could be just simple fraud. Freely acquiring others IP at no cost, and then almost giving it away because your Cost of Goods Sold is something close to $0.00.