In a 50 cards regass deck,you just play good decent cards that have a straightforward effect.
Mining Accident is not a really key card,so you won’t actually mind not drawing it early.Each time you play it,either you get a BP that fuels your aggressive runs,or the corp lose 5 credit which is not a small tempo hit.
The most shining stage of Mining Accident is in the early game,that’s why we play 3.In early games there are usually open centrals like Archive you can easily get into,and most corps just choose to get a BP rather than lose 5 credit in their early game,so you just play it to get a long term econ,with Val it means play 1 Mining Accident gives every run 2 credit,this sounds really good right?because it is.
Sure it gets a little bit worse in the mid-late game,then you simply discard it,not a big deal,if you successfully going into the mid-late game you only need more money and access tool,this card is no different from other non-access cards.
My point is that this is a card you don’t need to build a deck to make it work,it works on itself.It’s just a punisher card that actually done right.