Unfortunately, yes, they have more pull and power than any 100 individual sign shops..... probably more. Most of these guys when confronted with someone saying we won't do business with them anymore, it's like a mouse peeing in the ocean.
We've paved and paid they way for them to become successful. They learn by all of our mistakes over the years and it took some time, but they managed to get into the game, eventually. Then, ya have forums like this..... where everything is spelled out and all they do is read and decipher what and how they will approach it.
Did ya ever think about, what if I had a million dollars or 3 million dollars to spend on this or that and make this work and that hum ?? Well, they have the millions and many times over that and it's only a drop in the bucket for them to jump in. Then they multiply and keep on buying up more and more other distributors, until we'll all be forced out. It's a big game, but its all about the money...... no talent or creativeness involved, except on how to go about the eventual takeoff. That is their art.