It seems some webpages are using an anti-adblock tool calle "Admiral".
http://www.admiral.com
I found it being used at graffica.info. When you enter the page the content gets blocked by this banner:
Here's one of the affected links: http://graffica.info/pitchreel-app-creacion-videocurriculum/
Is there a way to block all Admiral anti-adblocks or do they need to be worked domain by domain?