I think I disagree a bit with the efficiency evaluation made by Diogene. While it is true that "clicking for 2 creds instead of 1 is very good," I feel like once you factor in the click and card it takes to install this, it becomes not very efficient, unless the game goes pretty long. First of all, let's consider Hedge Fund. It costs a click and a card to net 4 credits, pricing cards and clicks roughly at 2 credits each. Of course, since Hedge Fund is one of the better cards in netrunner, 1.5 to 1.75 credits per click or card is a probably decent baseline for the efficiency we want out of our cards/clicks. Even cards with flexibility like Predictive Planogram have a 1.5credits/click or card efficiency rate.
Now let's consider Nanoetching Matrix.
Immediately we see that the efficiency is never going to outdo Hedge Fund, since it at most generates two credits per click, which is the rate of Hedge Fund. That's fine, since most cards don't outdo Hedge Fund. However, the main problem is the steep initial cost of a click and a card to install, before we start getting hedge fund level of efficiency out of it. After 2 uses, it generates 4 credits for 3 clicks and a card, which is basic-action level efficiency, something we really want to avoid. At 4 uses you got 8 credits for 5 clicks and a card. Roughly 1.333credits/click or card. At 6 uses you finally got 12 credits for 7 clicks and a card, or 1.5credits/click or card, which is more or less the baseline efficiency of most standard playable netrunner econ cards. It takes 6 turns to get to the minimum efficiency for it to be really considered, and more turns than that if you aren't using the ability every turn it is installed. The problem with this is that if this is drawn anytime past midgame it's much worse than the standard economy cards. If it's drawn relatively early, then it still can only approach the efficiency of hedge fund. The risk-reward of the card just doesn't seem to average out to something worth including.
As Diogenes pointed out, being an asset that is almost never worth trashing has it's advantages. For one, it can bait out a run from the runner, upping it's efficiency that way. You can Divert Power this since it's almost always going to be on the board once you put it there. You can trigger NEH or other "install" benefits. But it also has some weaknesses that operation based economy cards don't have. It makes centrals slightly weaker as a trashable card, and the lack of burst econ makes it harder to recover quickly, which can lead to more losses in efficiency elsewhere. Most drip econ is more efficient than even Hedge Fund, like Marilyn Campaign for corps or Daily Casts for runners. This is to counteract the bonus efficiency that burst econ can bring (since you can install more cards, earlier, which can generate more money), and for when they are drawn 1-3 turns before the game ends.
As I see it, I don't think the card will see much play outside of Divert Power decks that value an asset not worth trashing, and MirrorMorph: Endless Iteration decks which can make use of the unique click cost to fire the ID more consistently. It's not a card that has lots of raw economic power/efficiency, and so I don't think it will be widely included in HB decks as an econ engine. Rather, I think it finds it's home as a card which makes up for it's lack of efficiency by providing synergy with Divert Power or ID's like MirrorMorph.
@JacquedZhang : great analysis! In the meta of 2021, which goes much faster, it might not be a great card. 1.5 credits/clicks after 7 clicks is not optimal. The 2020 meta was slower and allowed the use of those clicks. But because it create a pretty big credits differential, this could be leveraged with deck using Hard-Hitting News or Punitive Counterstrike. Thanks for sharing your analysis, it is very well though out. Cheers!— Diogene