From all the currents in this game this one is my favorite and earned a sweet spot in my heart. First of all it comes at 0 cost, which is always awesome if you just want to remove the runners current.
Let us focus on the real deal, this card is a powerhouse in terms of economy! Of course you won't play it in a no remote glacier deck. Fortunately there are many awesome assets and upgrades available. Obviously Gagarin Deep Space: Expanding the Horizon will benefit the most from this card. Have this on the board with Gagarisn ability and a Pop-up Window to "protect" your remote. Now you can place any asset or upgrade behind it and be done. The runner has to pay 1 for Gagarins ability, 1 for pop up while you get 2 back. One run will make 4 creds difference. Drop the pop-up for less important remotes. A simple PAD Campaign will cost the runner 5 to trahs while you gain 1.
This card has a 2 influence cost, which is well deserved, with 1 influence it would be overpowered. While you can argue that influence is too valuable to spend 4 on 2 copies of paywall, some decks should reconsider this. A Near-Earth Hub: Broadcast Center or Jinteki: Replicating Perfection, or even an Haas-Bioroid: Engineering the Future could squeeze this in and profit from its constant income. Also Paywall can heavily discourage the runner from running on your assets.
I had games when a single paywall gave me 10+ credits!