This is something that LoL does. It accomplishes multiple things
Allows players that might not have as much time to play a way to still purchase what they want if they put enough days into the game.
Increases play time of those who might play a few games a day and quit. If they have a way to get a reward for winning they’ll continue playing until they get it or become irritated enough to quit for the day.
Gives an incentive for all players to actually play the game and not simply log in. While logging in is good to use for numbers it does nothing to actually help the game.
Do you guys think Evolve could do well with a first win of the day key bonus?