Yesterday, one of the top traffic exchanges was hacked, and or temporary technical issues, now being listed as a problem site by Google. As all the top exchanges are excellent in customer service, I am certain they are working hard to resolve this now, and all will be back to normal soon.
Here in Hoopla-land, we temporary removed them from our listing until resolved.
This is why we suggest using Your Main TE Hoopla URL (current rankings) as Your Daily Guide and Checklist.
And for your protection, in this hoopla filled online advertising world, we wrote this page, our recommendation to help you.