If you’ve been buying new Nintendo games, you probably noticed a slip that allowed you to register games on the My Nintendo website to earn gold coins. Previously, gold coins could be used to purchase Wii U or 3DS indie games for about 80-90 points but the rework in early March will allow you to buy Switch games. Buying digital games will earn you 5% of the original price while physical will earn you 1%. The percentage lower for physical is to encourage people to buy digital as it gives a larger profit margin to Nintendo.
Nintendo hasn’t determined how many gold coins will be needed for purchases for DLC, full games, or even indies yet. The points expire after 12 months so if you’ve been saving them, remember to check your point total.