Is it permissible to trade in the sale of electronic games, their cards, and their charging, with the addition of a 10% profit margin, and what is the ruling on the profit realized from that?

Trading and shipping electronic games to customers is permissible if the game is permissible, and prohibited if the game is prohibited. The rule is that whatever is prohibited, its sale and shipping are prohibited, and whatever is permissible, there is no harm in earning from it.