There's an abundant documentation about "click compression", with a whole generation of student making thesis about it, experts and consultants working hard on it, some Fields medalists putting it in equation and Nobel Prize of Economics laureates refining it day after day, so I'll just give a reminder for rookies around here.
In Netrunner, you must try to maximize the use of your and/or deny your opponents ones the best you can. Also, 1 = 1 as long as you don't play econ cards, so if your deck doesn't improve this rate by at least 1.5 (conservative estimation), go back to your homework (or netdeck, there is not shame to that). Let's just point out that you can deny your opponent through denying , but for that being efficient, you better deny a lot of money with the minimum and you can.
That said, let's analyze Docklands Crackdown : it allows the Corp to deny a few to the Runner at the expense of a lot of .
And that's bad.