I think these tri packs offer slight paintjob or some sculpt variations to the figures; like wider or closer stance, applications of shades, wash color, perhaps silver to the guns.
What I suppose is that the boxes who wonīt be sold on Holidays would be opened to sellers of loose figures, perhaps by some speculators who pretend to raise the price of most wanted figures.
In a brief analysis I can tell, the speculators canīt won much profit from opening these boxes, cause they arenīt getting an extra piece like a build a droid part, a coin a slide; which they currently separate from the loose figure they sold.
They always sell the figure with its basic weapons, so let's imagine how they can made profit of the card.
In time of global crisis, when bussiness demands creativity, Hasbro strives to sell trhree figures at once, so the success depends on how desirable the character depictions are. Is very possible that in a short time Hasbro relaunches the kenner baggies of the eighties, for figures they want to sell at a more economic price.
This would be appealing if baggies figures were sold at a considerable reduction from the current price, and if in the shops, toystores the speculators wonīt interfere spoiling the offer.