i missed this chance :(
You missed it from the start. Your post could have been placed before the first code was redeemed and it wouldn't change a thing.
This is apparently the first time you post in this forum. How do you expect other users would select you as a trustworthy person over any of the many users they have known for a while and might even have talked to many times in the past?
If you wanna have an actual chance in future giveaways in the same format be a part of the community. Stay around, exchange ideas in the threads regarding many subjects, show people you have opinions (but always with respect). Talk about games you played in the past or hope to get to play in the future. Buy a few games and review them. Maybe even give a few away yourself if you get the chance and the income. And I hope you will participate in more than just giveaway threads because it's not like anyone will be deemed "trusty" just by getting stuff from others.
Otherwise you'll be just eligible and nothing else.