Some of the ads get malicious...

See: http://urlquery.net/report.php?id=1447106998163
See: https://www.virustotal.com/nl/domain/go.pub2srv.com/information/
Avast detects Win32:BHO-AON [Adw] launched from this domain.
Consider: -http://www.domxssscanner.com/scan?url=http%3A%2F%2Fpropellerads.com
See: -http://www.domxssscanner.com/scan?url=http%3A%2F%2Fwww.googleadservices.com%2Fpagead%2Fconversion.js
uMatrix has prevented the following page from loading:
-http://www.googleadservices.com/ -landing here, see report: http://toolbar.netcraft.com/site_report?url=https://s2.wp.com

polonus