[kh99]

There isn't an existing conditional for that. You'd need to create a plugin, because even if there was a way to check the message length in a template conditional, you'd still need to know if the ad had been displayed yet or not.

I haven't tested this at all, but you could try this (using hook location postbit_display_complete)

PHP Code:

$cutoff_length = 10;
if (!$adsense_displayed && (build_message_plain($post['message']) >= $cutoff_length))
{
    $show['adsense'] = true;
    $adsense_displayed = true;
}
else
    $show['adsense'] = false; 


(of course you'd change the 10 to whatever you want).


Then in postbit,

<vb:if condition="$show[adsense]">
(existing code)
</vb:if>