As a lifetime subscriber I actually find this very interesting.
So basically everyone with a lifetime subscription gets all the veteran rewards regardless of how long they've been subscribing for basically. Or at least thats what it looks like.
Pretty much, it only shaves one day off for me to get the ships. I assume the reasoning is that it's a better enticement to get people to fork over that large sum of cash. At the end of the day, it really doesn't bother me much right now since this is meant to be the final veteran reward anyway.