This ICE has been doing some work in Blue Sun: Powering the Future. At first, it was a test, to try and counter I've Had Worse. It works beautifully for that purpose. First, you look at the runner's hand. Do you see anything you would like to snipe? (I've Had Worse, Plascrete Carapace, Self-modifying Code, ...) If you can get a counter without breaking the bank, go for it. Use it immediately if you intend to bring it back at the start of your turn.

But here is the beauty of this ICE: You don't have to use it immediately. Keeping it means the runner has to be even more vigilant.

• If he stole a 3 point agenda and ends his turn with 3 cards, Punitive Counterstrike.
• Scored The Cleaners, SEA Source + Scorched Earth is lethal.
• Before committing to a SEA-double-scorch play, use a token to make sure there are no I've Had Worse in hand.

If you need that 6 credits right now, you have a window after the runner discards where you can use the token, before the start of your turn.

While everything @mabool wrote in his other review is still true, Snoop just got so much more potential with the release of Data & Destiny, especially because of it's synergy with Targeted Marketing.

So, what does Snoop do?
First, it let's us peek at the runner's hand cards on encounter. This is giving the corp useful information about the runner deck and what he is capable of doing and what not. Does he have Apocalypse in hand? Does he have recursion? All that can be extremely valuable information on it's own, but adding Targeted Marketing to the mix, we can now specifically target cards the runner has in his hand and is ready to install.
Second, if it's is not broken and the trace is successful (a big if) you get a power counter that can peek at the runner's hand again whenever you want! This allows you to get the crucial information right when you need it. For example, directly before scoring an agenda with New Angeles Sol: Your News and replacing the active current Targeted Marketing with another copy from HQ/Archives.

All in all, Snoop is a great addition to a New Angeles Sol: Your News Targeted Marketing deck that relies on knowing what the runner is about to play instead of just guessing it based on archetypes.