So what's behind this drop? It's entirely possible viewers are simply tiring of the chalkboard and the high rhetoric, which has been notably higher of late. And needless to say Beck is not the phenom he was a year ago, merely by dint of the country becoming more familiar with him.
The more you know about him, and it doesn't take much, the less you want him soiling your TV screen or your car speakers.
Glenn Beck is many things but he is not hard news (nor does he generally attempt to be). And considering the nature of the news, perhaps it's not entirely surprising that viewers were clicking away for a while. Sometimes it's nice to be told the world is not ending.
Maybe people are realizing that Miss Becky's koolaid is made of bullshit and snake oil and they're tired of the taste and being told to drink it.