It's over 90k to update an inscription from 5 to 6. Lower it or offer better payouts in chests.
Although I agree that rewards from all modes should be revised, cause current needs for them are very high, and it takes long time to farm them, I'm wondering why ppl are used to receive everything like on plate, and therefore they are not too patient. No one said that we are going to upgrade some things it quickly and it will be cheap. This is F2P life, slow farming of resources and careful distribution. So therefore either we can accept it and wait for revision of rewards, or spend cash and get things instantly.
Start playing in regular basis Wretched Gorge, Infernal Summit and Lost Realm, and you will see you will get red crystals.
Many people has those game modes in Oblivion and those are full of good resources.