A really solid econ card with a couple of caveats. On a click-to-credit basis, it's equivalent to a Restructure, and one that only costs 3. However, the first turn after you install it, you're down 1 credit; the second turn, you're up 1, and it's only the third (+3) and fourth (+5) turns that it really shines.
In other words, it takes 3 turns after installing it before it's any better than clicking for a credit, and it's pretty useless if you're going tag-me as any good Corp will kill it quick. It's also not ideal late-game, as the game could be over before you see the benefit of it. With that said, it's one of the most click-efficient moneymakers Runners have available.
Also combos nicely with Aesop's Pawnshop, bringing the net gain to 6 credits.