If they have been playing since the start and haven't taken a break, they likely already have everything that the nix box has and don't have much need for it besides the upgrades that were tested to be as good as the omegas from the last time we discussed it in an older thread.
But they still are of value to any of us that missed out on any of those items. Things like Neal Falconer, Ang the Vicious, Red Matter Capacitor, or even now the starship emotes, its still effective for me.
I still have a stack of 100 on my main that I was saving for another round of testing when I get them up to 1000, but I see the boxes are now character bound until unpacking, so yea...
Moving forward, what they will need to consider doing is starting to add in exclusive items as variants of the originals like what was done for creating t6 reputation items. Or even variants of the most expensive doffs (like a Zemok clone) to bring the prices down there too.