As the some sayings go, Graf... and sadly I must reign in my language, but-
... You contributed nothing to a neat little idea that has cropped up randomly except to troll it. Now go back to your cave, rock, or rolls of unmentionables that you craft beneath.
-Using them for random XP, maybe, though I don't think that would be very useful.
1: The items would hopefully be fairly rare, similar to this FCC in stranded junk cars on encounter maps. Thus XP is not necessarily the goal of except the exotic use the item has.
2: The rare item would have to have incredibly high XP in order for it to be rewarding as a rare item to locate. Which we don't need. There are a number of ways to raise your XP through the few quests, killing NPCs, and crafting as it is. There Are rewards beyond taking grind-time off the counter.
The problem I remembered though is about there being... non-dynamic maps, so you can't use item Water Chip to get working whatever in Vault Base, as example. Then maybe you could use them in order to acquire things, perhaps a unique vehicle (a trade, water chip given for his rustbucket vehicle), which might itself be used for a few things, such as being made into a particular vehicle, or cannibalized for its special parts.
And perhaps, if this thread grows, I shall have to move it to Suggestions appropriately. Depends on Proper Responses and feedback, I suppose, aside from nay-sayers who shall remained named.