Getting website visitors via QQ is a mess.

I saw someone posting before about getting the visitor QQ code. But if I didn’t look carefully, I found that many industries are doing this. Because most of the QQs of these visitors are groups with needs, balabalabala...
The following method was accidentally discovered last year due to the company's "needs". The principle is very simple, and I personally feel it is a Tencent bug.
1. Log in to the mobile version of qq, m.qzone.com. I didn’t pay much attention to the PC version.
2. "Homepage" -> "Visitor".
3. Development tools (F12)->network, ctrl+f "mqz_get_visitor". In this way, you can already see the json of the visitor record. The format is clear and concise. Pagination is also supported. In fact, after copying this url, you can view it without logging in. Occasionally something goes wrong, but just log in again.
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The blocked visitors of the third tab can still view it. The method is the same and there is no need to log in again. Is it considered a bug? ?
How to embed the code into the website? It’s very simple.

Someone actually sells it online. I really can’t stand it!

public function qq()
{
 $mqz_url = ''; //mqz json
 $vResult = array();
 $this->snoopy->fetch($mqz_url);
 $visitJson = $this->snoopy->results;
 $visitArr = json_decode(htmlspecialchars_decode($visitJson, ENT_COMPAT), TRUE);
 foreach($visitArr['data']['visit']['datalist'] as $ n => $v) {
 $vResult[$n] = array('uin' => $v['uin'], 'vtime' => $v['vtime']);
 }
 }