Here is the warning label. Because "prodby668 drum kit" is a fan-made compilation of sounds (many of which were originally paid expansions repurposed), there is no official Drum Broker store for this kit.
To find the most current and legitimate free download, follow these channels: prodby668 drum kit free
Go to Prodby668’s official SoundCloud or YouTube channel. In the description of his most recent video, look for a "Free Kit" link. Many artists hide a "Starter Kit" behind an email submit. You give them your email, they send you a Google Drive link. This is the safest method. Here is the warning label