I used the 2P fast track last year... when it comes down to it, was it worth it? I dunno, especially since I hit 2P at 15k, then took a RT ord-ams which got me almost all the way to 2P without the fast track promotion.
On the other hand, for your extra $500 you do potentially earn 4 extra e500's, and the 25% RDM bonus on the 10k mile difference.
If I were doing it again i would have probably done it with the RCC package instead, but when I started out I didn't imagine I would work all the way up to 1k.