One characteristic of campaign advertising that was more noticeable in 2012 than ever before was its uneven distribution.

The statement above is TRUE. In America today, political advertising is serious business. Financially, televised political advertising consume at least half of the total budget for a major political campaign. Despite this huge amount spend on campaign, during 2012 election it was observed that although some states in the United States were saturated with political campaign advertisement, some states, such as Pacific States, hardly got any presidential campaign advertisement.  

It's if you can't see their account. much like a twitter block, they might tell you.