With all due respect, your statement is only about 50% correct. With that said, it is as everything in life much more compliated. Even our supreme court has gone back and forth on issues concerning this. In the 90's I worked for a big company that was sued and lost on exacty this issue (the issue being whom the manufacturer would and would not sell to because of "protected" territories).
For anyone that cares to read more;
It looks as if since 2007, the supreme court has allowed more of this price fixing idea. As far as "standing by their contracts", I think it shows they are too lazy to address the real problems that would result in making even more sells.
But let's get back on subject, this is a water softening section!
Do you have a document that explains the technical advantages/disadvantages of using a packed resin bed?