Hey guys,
it seems we have already posted some stuff about Popads but here is what we noticed today:
Popads data:
Impressions: 114,942 Cost: $230.43
Impressions: 77,878 Cost: $165.26
After this we compared statistics for previous periods, and the picture is pretty much the same.
How the F is that possible? 
They basicaly charge for the traffic that they do not provide? Or is it bot traffic?
It is called click loss and unfortunately it is a part of doing business on pops. Basically a certain percentage of your users don't make it all the way through to the page. One reason being they close the pop up before it even loads. You just need to expect it to happen and account for it in your costs. Don't trust the popads bid token. Some geos are double the cost because of click loss.
Clickloss is massively different from geo to geo and also different once you optimize and cut out some traffic. But it's 100% part of the game, and it's good to keep daily cost and revenue sheet so you don't notice this 1 week into running high volume on a campaign.
What GEO? I have about 20% clickloss usually, but on TH I have 50% clickloss. Support told me that it is normally for this GEO.
If your geo is not TH you should try to buy server near your GEO or use CDN. For example I'm running VN campaign and my VDS in VN.
Good luck!