This will be short, but this card deserves another review.
People who call it bad are, I think, looking at it from a wrong perspective. Build Script is not a card - it is deckbuilding WD40. Any deck it is dropped into will run a bit smoother and more efficiently, as if it was well-greased. It is a deck-thinning card - you draw into it, and it replaces itself in the most efficient way possible. For a click, you gain a credit and two cards - it is like three less-than-desirable basic-action clicks rolled into one. It is really great! It is not a draw engine - it is not there so that you can fish for that one card you need - but it is a tool to, in general, draw into stuff you need to draw into faster and at a lesser overall cost. A 45 runner deck with 3 of those is like a 42 card one.
Sure, deck-thinning of this sort is worse in Netrunner than in many other card games, because you are still losing a click, which means that it is not entirely frictionless - but about as frictionless as it can get in this game. And this handles really well in play - makes your deck that much more consistent, because as long as you have it in hand, you always (0 cost) have a better alternative to those annoying "I need to click for a card/credit" moments.
And that warrants an influence cost. Would this card be too good if it did not have influence cost? Yeah, kinda - because it would not have any cost associated with it. It would literally fit in any deck that does not absolutely need all the card slots it can muster, and would make it that single bit more efficient. So, just like Deuces Wild or Process Automation it needs the influence cost, so that including it in a deck is a tradeoff. And yeah, that makes it not fit very well in many lists, which are already short on influence. That's fine. But for any deck that goes "I need to draw into cards X, Y and Z as frictionlessly as possible", this card is worthy of consideration. It makes them run just that one bit smoother. And that is always a worthy goal.