CoinURL ( https://coinurl.com/ ) is a site similar to other URL shortening sites, except with a coinurl link, you receive a small amount of bitcoin when someone clicks on your link. When they click on the link, they are shown an ad of another site. After a few seconds, a "skip ad" button appears and they can carry on to the site. I think they have to actually follow through to the site they were trying to get to in order for you to get the bitcoin for their click tho, but i'm not sure on this part.

Hope that helps.