As long as there's a risk involved and it is some kind of prediction, win or lose type of games, then I would always consider it as a form of gambling.
Sometimes even if it's not directly money as long as it have a value and it is being risk then yes it is gambling.
You are not using your money to gamble so what kind of risk are you referring to?
You should first know what the meaning of gambling is; as long as you're not risking your money for the chance of winning or getting money then it's not gambling, like I said previously it's more like a giveaway (go to games and round) and see them there.
According to me if anything that will have value and bet instead of money then it is consider as a gambling. Not only money is used for gambling nowadays, gambling can also be done with various valuable things. Moreover, even if you earn free money and gamble with that money, it is also gambling. In this regard you may have been earning money for free but it was later treated as your money. If you don't think it as your money, you might not think of it as gambling. But I would totally compare it to gambling.