How does the mechanic of "exhaust" work in KeyForge and how does it impact gameplay strategies?

In KeyForge, the mechanic of "exhaust" means that a card cannot be used again until it is ready during the next turn. This impacts gameplay strategies by forcing players to plan ahead and consider when to use their cards for maximum effectiveness. Players must manage their resources carefully and think strategically about when to exhaust cards to gain the upper hand in the game.