iTunes gift card discounts are noticeably less common than they used to be, and while we do see 20% discounts from time to time, a $100 iTunes gift card for $85 is still a solid deal if you pay for apps, movies, Apple Music, iCloud storage, or PokéCoins.
Source: Kotaku – Save 15% on Apps, Apple Music, iCloud, and More With This Discounted Gift Card