It's just a fun little thing to make the game a bit more interesting. Whenever you sell something, you have a very small chance to see that. And whenever you upgrade something, you have a very small chance for it to say that somebody gave it to you. It's all simulated, and not real :)
I was grinding in the void and it said that I gifted someone a item can I just do this with the items that I don't want or is it random.