I just did little maths to see how much he spent :P…
So, if he played 3000 objective games (I think it’s 1/3 case drop chance) he would get 1000 cases…
Out of those 1000 cases the most likely result, but not true one is 800 leads, 150 irons, 30 bronzes, 15 silvers, 4 golds and 1 cobalt (which probably isn’t even Kira)… So for first trade up you would need 18000 credits and would left with 800 leads, 150 irons, 30 bronzes, 7 silvers, no golds and that one cobalt you traded + one from before…
For second trade up you would need to spend approx. 106000 credits and would you would still have 800 leads, 36 irons, no bronzes, no silvers, no golds, and two traded cobalts + one from before…
For third trade up you would need to spend enormous 304000 credits cause of many lead to iron trade-ups… so for 3 trade ups (with no case buyings, you would spend total of 428000 credits… Thats the true worth of cobalts…
(107000 credits per cobalt if we count one that dropped from eq case + 3000 objective games [I don’t know the lenght, but if it is long objective match it would be around 15 mins… So max. of 750 hours of gameplay])
You would still have 44 leads left, but no point of it 