Solid example: I designed in an MCU into a product. Design work was done, at the time, in the US. Pricing was around $1.40 in the US. I went to Asia and got quotes on the part number and price was coming in around $1.00.
I went to place the order, and once it hit the factory, it bounced; they returned the price to $1.40 and refused to give it to me at $1.00.
What happened was the sales rep I was working with in the US reported my company name and part number to the factory, and the factory cross-checks all orders placed globally against the registration table. If you match against someone who claims your regsitration, then the factory will honor the pricing originally given. The theory is to protect the efforts of FAEs and sales reps in the US from overseas price competition, I think.