What is the significance of "the best hamburger" Dagny has ever tasted when she goes to the diner in Wyoming?

The maker of the hamburger is Dr. Hugh Akston, another former professor at Patrick Henry University, who also taught the three students Dr. Stadler mentioned. He has obviously dropped out of the socialistic society. He refuses to discuss the inventor of the motor with Dagny. The fact that he makes such a great hamburger shows that he maintains his integrity by presenting the best possible product. Rand makes it clear that Dr. Akston "knows something" when he gives Dagny her first cigarette with the gold $ sign on it.