Gambling is something that has to do with staking money for a chance to participate in a gambling game but in the situation addressed by the OP, we can consider it to be gambling because it's a promotion provided by super sport and gambling website in order to have more customers on their platform. It's just like giving back to the community.
Gambling does not have to use money, on this site you may not use money to bet but bet to get points or use the points themselves, besides guessing or betting to get results it is already called gambling, even without having to spend any money, but this promotion is great already there must be sponsors in it who fund to attract many users to play and bet as well as gamble on this site.
I haven't tested it but beginners should test this to feel their skills and also add to the experience of this site, it's a good idea before betting on sports betting using real money, I think this site is intended for training for new users to feel their ability to predict, analyze their bets in betting sports