Ok, an example of a Score round perspective....
My own fam was pretty active at start, and gained nr 1 spot in size at one point, and was top 5 in both NW and size over a lone period. We got many score points, as the whole fam had players in good ranks. Ofcause score comes from players ranks, as its the players ranks that makes the fam ranks..... Well, we then got comfort, and overlooked the plans of 91, and 70
They did good, and jumped us, and we had to sand alone. As my fam just had few active members left, and a non existing allie, we went down hard, and lost NW and Size ranks.
Now we could lay dead, or the few of us could fight back, and score points in personal ranks, and keeping the fam score points up a bit longer. We tried to stay in top 10, and ended 11 in Score ranks, so we are satisfied with that, and we had something to fight for, instead of hanging around the rest of round as loosers. This is an example of how score can be used in a good motivational way for less active fams, and explains mostly why we didnt want a NAP with 91/70 
waste, the legacy of mankind.