[bartek24m]

I dont understand what's:

add a global $template_hook;
line before you set it in the plugin.

but if you mean, it should look like:

Plugin:

$count = $vbulletin->db->query_first("SELECT COUNT(*) AS count
                              FROM ".TABLE_PREFIX."thread 
                                WHERE postuserid = ".
                                    $vbulletin->userinfo['userid']."
                                    AND forumid IN(164, 165, 166)");
$template_hook; 
$template_hook[profile_stats_threadcount] = $count['count'];

template:

<li><span class="shade">Płatne Artykuły:</span> $template_hook[profile_stats_threadcount]</li>

It still doesn't work