Is this the project you are referring to?
https://yieldyeti.com/It looks decent to me, I don't understand first what you are saying that you can earn without investing but upon checking the site it says that you can apply through their scholarship if you have good gaming skills which I think was not new at all, anyway they also have NFT where in you can earn by holding and upgrade it to increase its yielding.
I am not really fan of play to earn games and doesn't know whether the game is good or not, I hope they would open an ANN thread here some users might be able to see and give feedback about the project.