Originally Posted by
darben
buy a ticket to/from palm springs and another for the rest of your trip. If you are in Palm springs you can always cancel the unneeded ticket and if Amtrak keeps 10% you are out about $4.25 per person
If you do that and end up traveling LAX-SAT, though, you'll only get AGR credit for the short LAX-PSP segment (100 points) and lose out on the much higher AGR credit for the PSP-SAT segment, which will post as 0 points, as it's a second ticket for the same train.