Im' guessing Amtrak doesn't lose too much sleep over them because it may help drive business to them that they might otherwise not be receiving (people view a 1/2-price fare as the option of taking the train).
Oh, I'm sure that Amtrak cares to some extent. If they didn't care, then they wouldn't have placed the heavy restrictions on that magical H570 code this summer that everyone was using.
Now it may be that someone at Amtrak has decided that persuing every auction is simply too much work, with only a small benefit to Amtrak. Or it may be that no one at Amtrak high enough up the ladder has learned of this problem. Or it may be as Robert stated that Amtrak simply believes that EBay should do the policing and is fighting to get them to do it.
But regardless of the reason, Amtrak really should be doing something about this. We've had discussions here on the forum before about the ethics of people using codes that they shouldn't be using, and I won't go back over that ground again in this topic, that's not what this discussion is about. However, I personally do have a real problem with people profiting off of something that can be had for free, by simply doing a bit of research on the internet.
Racer, please understand that this isn't intended as an attack on you personally, I for one love to save money whenever I can too. But seriously, head to
Flyertalk and get these codes for free and stop paying these scam artists. If these clowns stop making money off of selling free info, then they will stop trying to sell it and solve Amtrak's problem.