They appear to be non-agouti based Siamese. Which is good, agouti Siamese have more diluted points. Meaning, you are working with some decent Siamese genetics! If you have a line of Blues, you can breed them into the Siamese and have Blue Point Siamese Rats.
Personally, I breed pets only. I used to breed for feeders, but I started liking the rats too much and switched over to f/t.
As for feeder breeders leaning towards wanting the really fancy rats, I guess I can understand that too. It adds an interesting aspect to the hobby and with most people into Ball Pythons, one of the things that is fascinating is the genetics. Which is on turbo speed mode with rats. You get to mess around with genetics at a much more rapid pace. Just my thoughts anyway.