Steam Gift?

When I redeemed my tier 3 KS key on steam, it gave me a gift called &quotSunless Skies tier 3 KS Gift&quot along with adding the game to my library.

Now, I am curious as to what this is. Is this another copy of the game? I don’t think it’s the second copy I paid for because I haven’t even used/given that key out yet.

[color=#cc0099]A few people seemed to get these accidental free gift copies - feel free to give them to a friend![/color]