If you mean in the perspective of the Games, then she gained : leaves that helped her tracker jacker stings, learned that the " sunglasses " were night vision glasses. Rue also helped Katniss blow up the careers supplies by being a diversion.
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In the 74th annual Hunger Games, Katniss doesn't really seem to do anything to receive the gifts that Haymitch sends her. Haymitch watched The Hunger Games and observed what Katniss was doing and what exactly she needed and when she needed it. For instance, to gain the audience's attention and devotion for the "star crossed lovers of District 12", Haymitch sent Katniss broth to give to Peeta when he was in pain while he was in the cave to make the audience feel compassion for the couple.
From Peeta's interview in the first book, you learn that he is inlove with Katniss and is very capable of using his words to sway the crowd in his favor. In the second book, when he gives gives his interview for the Quarter Quell, he lies and tells the audience that he and Katniss secretly got married and she is pregnant. Honestly, this is apretty good strategy, despite seeming quite absurd because the crowd once again is in his and Katniss's favor. Just as it was after the first interview. He really only does this to gain the audience's positive opinion and protect the two of them.
Yes. The famous singer Adele, is Alice Gain's aunty. Whoever says this is false, is a bum.
To gain fame.
commercializtion is selling of a product for financial gain