Login reward on mobile gone

Hello Tenno! We looked into this and believe there is a misunderstanding. 

You received one of the classic 75% off Market Purchases coupon that existed on Console (and iOS now)! If you were originally a PC player you are probably used to __% off Platinum Packs, which is not an option on Console & iOS. 

So for instance, Platinum was not discounted with your coupon, but items in the In-Game Market (Warframes, Weapons, Skins) would have had 75% off. I hope this helps!