There is no such thing as the "World Poker Network". You clearly haven't done any research on them if you don't even know what network they are on.
This was addressed on page 1 of this thread. We don't do any research on poker rooms or casinos attached to sportsbooks. It was a mistake to even mention the poker room.
It's considered a separate entity to us and they aren't mentioned in the reviews other than having a check mark in the grid containing the different features and markets of each sportsbook.
I apologize for the post.