It would have been nice if there were figurines or spaceship models from the games or maybe some printable 3D model files as rewards on certain occasions, achievements or as anniversary gifts (in 28mm to 50cm formats) or something like that.
Of course not everyone has a 3D printer and in case of manufactured models there is the issue of shipping it internationally but... It still would be nice to be able to have a figurine from the game one likes.