Tell you about the store I am familiar with. Probably the business model of this industry is similar. Since I am also a madden enthusiast, I also visit this type of store. Especially for Madden Coins is essential in the game.On GameMS, you can see their activities at first glance.
Generally, they will set a discount code for the user, and the discount code will be automatically reduced after entering the order. For example, now Christmas or GameMS is only ending this promotion on January 5, 2020, then, you can place any order at any time before the day arrives, When you Buy Madden Coins and enter the payment pagethen enter the discount code "XMAS" and then the product Immediately enjoy 6% off, very simple and fast. And the delivery speed here is also very fast, which definitely guarantees the safety of users.