Personally I find that gives me a good excuse as to the reason I just got annihilated, and I’m able to curse the culprit effectively for their obviously ill-gotten advantage.
When I note they have no cards and killed me with melee, I feel a deep sense of shame at my own inadequacy. :)
Seems about right from memory. Though sometimes you also get a cosmetic, like an emote maybe?
Yesterday I got three Trooper crates and had the same duplicated card in each… :P