For me, there is no difference between gaming and gambling, as they both are designed for fun. Yes, playing games can bring a reward, but it is not related to investment. Some people gamble in pursuit of money but I didn’t hear them calling it an investment. I think that the only people, who can be called investors, are game developers https://businesscomputingworld.co.uk/t/best-software-providers-of-online-pokies/796 , as they are investing their efforts, skills and time with the hope for returns from games. And rewards, received by gamers or gamblers are intended for their engagement in a particular game IMO.