First, I never saw a CG that would not make it at least to tier one.
Second, yes, if that happens the CG fails and nothing happens.
Then the next question really is, what constitutes a succesful CG?
Obviously maximum tier is success and less that tier 1 is failure but where's the middle ground?
I find it hard to believe that getting 99% of the way to max tier would constitute failure but similarly how do you determine where tye fail point actually is?
So you're saying that the tiers are really only "degrees of success"? Good way to do itThe fail point is before Tier 1. If it doesn't reach at least Tier 1, it's simply a fail.
Higher tiers only determine your overall reward (The higher the tier, the more money you get for your contribution) and sometimes it determines "how much successful" the CG was. For example when a new station is build, on lower tiers it is only built with basic facilities like Market, refuel and rearm, but if higher tier is reached, the station will have outfitting, shipyard, etc...