All info I googled out, like some reddit post and this TI post replied 4 months ago, said Pornbay is open for sign up
and there's also no thread about closing event in BitTorrent News section.

However, http://blankrefer.com/?https://pornbay.org/register.php page says registration is currently closed.

Am I miss something, like there's other sign up entrance, or it indeed closed silently? Is this tracker invite only now? like no application? Thanks.