Rogue 4 said:
Ok let's try this (and it may open a whole new bag of problems, I am not sure):
Defense Protocol x2 let's you do two damage to a unit.
Emperor's Web x2 let's the first Sith Event becomes -2
Mission Briefing x2 let's you draw 2 cards on your opponent's turn
So I would see how Hoth Operations would each give a speeder Edge(1) meaning a speeder would have Edge (2) if there were two out.
While it's true that each of these pairs work, they work for different reasons.
Defense protocol is simply two separate reactions to the beginning of your draw phase, ditto mission briefing. They don't "stack" any more than playing two copies of, say, superlaser as two separate actions "stack."
Emperor's Web, which Hoth Ops has the most in common with, simply applies two separate cost reductions of 1 each, for a total cost reduction of 2. This is still slightly different, though, as both copies of Web are affecting the same stat on the affected card.
Even here, Hoth Ops is slightly different, because it's adding a second copy of a keyword to another card's text, so the relevant ruling is what happens when a *that* card has two instances of a particular keyword. As Rogue 4 says, the takeaway for this ruling is that if a particular card has the Edge trait multiple times, the values are additive.