Honestly an event like this damn well should be multiple times per character. A typical day's haul for me in this even is pretty close to a 50/50 between copper and silver.
yea...it should be...more so with it being so short...started a Bucc with the last Burning Event and need some Totems
*Dark Lords of Darkness is 6 days instead of 2 weeks like it usually is despite being one of the most requested events, and one of the most dependent on luck.
Not only that...but it can only be done once a day per character (even though they are untradable)...so that gives you 6 tries to get 3 totems for you class out of the 16 different totems.
Nexon could just make the expiration time be when the event ends so they stack.
Edit: They are so easy to get there is no reason for them to have a 1d expiration time. The only reason to have a 1h expiration time is so they don't stack and fill up our Use inventory every minute