#4247 Certain advert sites stopping page loading

For about a week now, Slashdot pages have not been fully loading due to waiting for 3rd party sites. This is usually fixed by just refreshing a few times until a site that is not down is selected for advertiesment.

For example, if I try and read an article, the header will appear, but the page will just wait for something like
genweb.ostg.com
(allthough there have been others)