The idea is to make subscriptions more worth while as well as helping to keep them rare. Hence why I altered my original idea with the vet reward requestion idea.
A fleet project, any tom, richard and harry could get them and then who would play the lock box lottery. At least combine them with the vet rewards, Cryptic might get more subscriptions and lifetime members.
I see your point. However, with the number of people I see around with vet rewards active, it doesn't exactly seem like it would make the lockbox ships rare. Maybe a pretty high-level, like the 1000-day one or so would do the trick.