OGame introduced Officers: permanent upgrades bought with premium currency (Dark Matter) that grant direct statistical advantages in combat — more speed, more production, better defenses. Pay more, get more power on the battlefield.
In 5Dim no such mechanism exists. The available boosters accelerate production and construction, but do not modify combat stats and cannot be activated during an active attack. Moreover, all boosters are also obtainable through missions, achievements, and the player-to-player market — at no real money cost.