Don't worry if you see a blank screen or 502 server error when you click the direct link. This usually happens if:
you use VPN or proxy -- our advertisers do not pay for such traffic;
your traffic does not fit the targeting.
If the traffic you send matches the advertiser's targeting, your visitors will see the ads.
To monetize the traffic that does not fit the requirements, you can set up backlink on the offer's page.