: This is often deceptive marketing . Sellers on dark web forums or Telegram use "UHQ" to justify higher prices, but the lists frequently contain "public" data that has already been leaked and widely used by other hackers.
Are you interested in from these types of credential stuffing attacks? Combolists and ULP Files on the Dark Web - Group-IB combolist uhq.txt
Usually very low (under 1-5%) as users change passwords after leaks. "Private and unique." : This is often deceptive marketing