Will my "come back to maple" code from April's nexon newsletter still work?

I was searching some old email accounts of mine for millionth-customer nexon cash codes (up to 33k so far!) and I came across this newsletter from April that has a code for a bundle of cash items: 5 charms, 5 VIP rocks, a random weapon cover, and a 4-hour 2x exp coupon. I never used the code back then, but is the code still valid? Im thinking yes, since other codes like itcg cards still work... Am I wrong on this?