You do get experience, it's just such a tiny amount 😂

If you now complain about the amount of xp you get I totally understand ahaha

edit: but those were not valuable intel, if you have highly valuable intel or even the enemy commander papers, you get way more experience

In the video, you can clearly see that it does give you when you drag documents in it.

Looks like it's because the equipment box does not change it's faction when the base is captured (it still belongs to FIA and offers FIA equipment, in the video when you hover over the map, you can see it's called Map (FIA)), so it's like giving the intel to the enemy's arsenal: no points scored.

There are many of these boxes that don't change faction affiliation, and some of the least noticable are the boxes with repair wrenches and fuel, because these items are no different between teams, but you still won't score points if you give intel to a vehicle depot built by the enemy, even if you control the base.