With the changes to player-induced supply in 0.97, it has become very easy to make huge profits through mass-selling, and then raiding it back.
1. Mass-sell items for excess (green) units
2. Raid it back with high raid effectiveness (you can even earn above 100% of what you sold if conditions are right)
e.g. (with 9 raid effectiveness)
It scales, with diminishing returns. (As items will progressively lower in price the more you sell, but you can still raid everything back.)
The overpoweredness of this exploit is compounded by the fact that you may gain very decent amount of experience. Somehow I don't lose a lot of marines in these raids either, maybe because raid effectiveness is high?
Furthermore, it seems that shortages due to raids expire faster than excesses due to player shorting, so you can actually raid colonies a second time.
Anyways, I think this is definitely unintended and broken enough to warrant a patch, which is why I'm putting it in bugs.