This was the box event wrapper. It doesn't say anything about not stacking.
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I was lucky enough to win it, but I already had one.
And it doesn't stack.
How can you run a current event with an old grand prize? And you didn't even have the common courtesy to let us know we were wasting our time and money trying to win this event!
IPassButter, this needs to be addressed. Either make the boost stack, or substitute another unit with the same boost.