This ICE captures the spirit of pop-up windows perfectly: draining for the recipient and generates some wealth for you! This will almost never stop the runner, but it has the ability to get the Corp a lot of money over the course of the game.
It's very effective against runners who rely on Desperado, Security Testing or other economy from running. It's much more useful early game, the install costs of placing this ICE deep would greatly affect its cash flows. Hope for one early and watch the ad money flow! They'll be praying for Adblocker.