I believe I know why people keep using this in present day, and the extension hasn’t been removed.
Seen in KonekoKitten’s video, the extension was talked about with its original creator. The creator stated that it wasn’t originally made for how people are using it today (malicious or harmful).
In this case I do not believe that Roblox has a fighting chance in taking the extension itself down. The only case it has is the plugin is being used for malicious intent. But if the creator of the plugin hasn’t created it originally for malicious intent, then that case is more or less lost.