It says, "Key: Each day new random keys appear in the message area. Click on the key every time you see one, because it will help you to get out of the block (even with a bad score in the mini-competitions)."
And I was really active too, on all day.
Does it mean that it will save you from being nomed, but not if you are already nomed? :/
so you got the key after being nommed ok - that is correct you have to get the key before nommed. Get as many as you can - keys will help you stay - however, competitions and activity important too.