WoltLab actively monitors the web for unauthorized installations of their intellectual property. If you are caught running a nulled version of their software:
While the prospect of downloading a "nulled" (pirated) version of Burning Board 3.1.8 or version 4 sounds appealing to save on licensing fees, doing so introduces severe risks to your server, your user data, and your reputation. What Does "Nulled" Software Actually Mean? woltlab burning board 318 nulled and 34
Access to an official plugin store to safely extend your community’s capabilities. Conclusion your user data