Do any game apps really pay?

I've heard about game apps that claim to pay their users for playing, but I'm skeptical. Can you really make money from playing games on your phone? Are there any legitimate game apps that actually pay out real cash or cryptocurrency to their users? If so, how do they work? Do you need to meet certain requirements or complete specific tasks to earn rewards? And how much can you realistically expect to earn from these apps? I'm interested in finding out if there's a viable way to make some extra money while having fun with my mobile games.