User blog comment:ShinnyShin/The Problems with the S-Class Tier/@comment-27524282-20160325143843/@comment-27980511-20160326094453

Brilliant ideas that Gameloft will, of course, never allow to happen. And yet they sound a lot more financially viable in the long run. It would solve a lot of problems for the gamers and still give them some sort of revenue. Unless they seem to think that hackers who don't pay them any money, are more valuable to them than players who would support a system that would keep them playing for years to come?

Looking at the rewards for Win Streaks, you never get any higher than C-Class upgrades, and therefore will have a surplus of D-Class upgrades. 8 times out of 10, even those 18 000 Credit PRO Kit boxes have more low-tier cards than anything, so they would be more useful if we got the chance to  upgrade them.

Say if you collect like 10 D-Tires, you can upgrade them to make 1 C-Tire, then 20 C-Tires to make 1 B-Tire, 50 B-Tires to make 1 A-Tire, 100 A-Tires to make 1 S-Tire.

You know, something like that, and it could work in a similar way with Tech cards, and Engine cards as you say. And their revenues could still come from their promotions, offers and that player market, of course.