[Animats]

That was normal US B2B behavior until recently. A supplier that cut off their customers for no good reason would lose their reputation in the industry and have real problems selling.

Then we got down to a very small number of major suppliers in some areas. Many have moats that deter switching. This gives the big suppliers too much power.

A century ago, this happened with railroads. Which is why railroads were forced to become common carriers. They're required to transport goods for anybody who can pay. Read up on antitrust activity of a century ago. We've been here before.