The difference is simple. If people do not know about the situation they can't help. You can try and convince yourself the sign did not help but the fact that you and I are discussing the topic and I live on the other side of the country puts that argument to rest.
I (and many others)would have not known about it. And now that I caught wind of it I have spread the word to all the people on my email list. Those people in turn will tell others. Hopefully someone out in your area will come up with an address where donations can be sent.
Or we could all complain about how the sign was a waste of effort. Ever here the story about the flood and the farmer and God sending him help? ;-)
That's is an excellent point. I guess I can be pretty anal. I was thinking local, not national. Alright. I get it...:-)