OK, so against my better judgement, I bought a hypercrate.
Got a load of encrypted datacubes, several of which I got multiple times.
Avoiding spoilers, I won't say what they do, but you can only use each TYPE of cube once. So if you get it more than once, the duplicates are useless to you.
OK, consider selling them? Nope, BOP. Can't GTN and can't sell to vendor either. They'll just sit in the cargo hold filling space. The damned things don't even stack. About all they are good for is incentivising people to buy new cargo holds because they're now clogged with stuff that the game won't let them use and won't let them get rid of.
Guessing this can't have been the intended function. Any chance of a fix?