Glow in the dark 'stuff' does run out over time but i can't think of the reason why. Something about light degradation. Like those colour change materials. If you leave them in sunlight (maybe other strong light) they won't colour change anymore. Just like the glow in the dark stuff.
I use to keep all packageing but it just got to much so i turfed it. Don't see i the point if i'm not selling them and even then people will buy loose items.
I regret some of them that had tech specs on it but whats done is done. Now i only keep packaging from Masterpiece line and Gen1. Everything else goes to the...wherever cardboard goes to die.