Hello, Commanders!
Though I understand many of you're not happy with the way Mercenaries drop from Contracts, it has nothing to do with gambling.
Gambling means you receive some real-life profit, it's not a case with the game.
From the very beginning, it was said that the higher Mercenaries' Grade is, the harder it's to obtain him. It's logical as Mercenary of higher Grade, gives you higher Bonuses and correspondingly they're rarer.
It's how this system works in all RPG games. Many depend on how lucky you are!
