Christian – a lot of affiliates face the difficulty you mention, but only because so many of the poker programs/rooms are already saturated; i.e., whatever visitors you have to your site already heard of or have accounts at the rooms you promote….and the biggest affiliate sites (pokernews, etc) are the experts and have the resources to grab up whatever new players emerge first…
I specifically asked about ZEN and FaceUp as they’re relatively new, and specifically outfitted to the current US market