Please change the limit on the chests that are aquired during events. Once every 24 hours is kind of unfair. If people are not able to unlock all their chests that they have aquired before the end of the event, then it all goes to waste. i would recommend once every 12 hours limit. Thank you.
You can purchase the gold key for 10 nobility points and open as many as you want. If we could open 2 every 24 hours instead of 1, the gold key would be almost useless. And that will mean less income for ATA.
As chocolate said you need to unlock extra chests with the gold key. It's not unfair it's free stuff with the option of paying for more on top. Nobody forces you to open the extras as there is no harm in not opening what's left.