Seems like we're all having the same issue. The ad takes up so much of the screen it's difficult to navigate to My Portfolio. The My Portfolio tool is why I use Seeking Alpha. If this issue is not fixed I will leave and use another site.
SA's content is dominated by an that suddenly appears and covers 2/3 of the viewable page. It covers the link to my marketplace subscription. Even when I scroll down it stays active over approx 3/8 of the page. As a rule of thumb, when I visit a site that has this type of ad I immediately leave.
Almost as bad here. Very intrusive. Makes it much more difficult to navigate the site.