I just made the tough but necessary choice to stop using them. Although they offer high accumulated earnings at a rate faster than any other ad network I've ever used, they have too many flaws to keep using them. If you let their interstitial ads run, they will often take many seconds to buffer before they begin the five-second countdown to let you return to the original site. If you set it so that they no longer run and just opt to run their pop-under ads, you will not be better off because once you click a video or link to another page on your site, those ads will produce a pop-up ad in another tab and you or your visitors will have to click that video or link again. You cannot in good conscience share your referral link or try shortening links to URLs because their links are deemed unsafe - never mind that I told them about that. No matter what they constantly say about having made their links safer, their links will not be accepted by Facebook.
Is this your business?
Claim your listing for free to respond to reviews, update your profile and manage your listing.