google_kw ?

Hi,
I saw this google adsense code (at famous blog)

google_kw and google_kw_type is available for all adsense users? or just for adsense premium accounts?

<script type='text/javascript'>
var randomNumber = Math.random();
if ( (0 <= randomNumber ) && ( randomNumber < 0.25) ) {
google_kw='venture,bank,capital,angel,seed,money,invest';
}
if ( (0.25 <= randomNumber ) && ( randomNumber < 0.5) ) {
google_kw='venture,capital,finance,invest,startup';
}
if ( (0.5 <= randomNumber ) && ( randomNumber < 0.75) ) {
google_kw='mobile,network,podcast,search';
}
google_ad_client = "pub-XXXXXXXXXXXXXXX";
google_ad_width = 160;
google_ad_height = 600;
google_ad_format = "160x600_as";
google_ad_type = "text_image";
google_ad_channel ="";
google_color_border = "FFFFFF";
google_color_bg = "FFFFFF";
google_color_link = "00A700";
google_color_url = "00A700";
google_color_text = "000000";
google_kw_type='broad';
</script>

 

I have never seen this before.

 

i think it`s for premium accounts

 

You can't change you adsense code in any way as a normal user.

 

Here is one reason. Not use this code.