It would be really great to get past limited rewards (buildings, generals, explorers, geologists? etc.) in new events (of the same type, like here) to anybody who didn't get them - as an addition to new rewards and at full price. Time played isn't the only factor (you had to know about the game first), and you will still have to play more to get those rewards.
Refills for 1/10th the price probably still wouldn't be worth it.