This is just a platform for gambling. Obviously, the expected return for the gambler is negative.
Not if you are a really good player
I think that skill-based 'gambling' is just starting...
You are right, it's 100% skilled gaming. The outcome is based on your skill not luck or chance
Tetris is 100% skill? One could argue that the pieces are generated with a random number generator. Does each player get the same pieces in the same order? Are the pieces disclosed before the game begins?