IMO if the $1,000 is upfaring two IAD trips to F, it's worth it on its own merits and 1K is just a nice side bonus
I would probably do it regardless for the soft benefits, but it is much more ymmv if you don't use the GPU. You can bum-ride the instruments for a long time on your IAD trips next year, and probably clear occasionally plus the free food and drink and better overall treatment is worth something.