Think of it this way: Feerik has a billboard (page) it is not using, so it sells this ad space. This ad space, or billboard, is where the offers are. Why do they pay in Feez? To entice you to take their survey, click their link, join their community. The exact same ad is probably on some other site, paying in some other currency. They market to the widest audience they can, so they can get as many people as they can to take their survey, click their link, etc. These advertising companies do not filter by country because they want the most people to click as they can.