First of all, it is not allowed to run giveaway/promotion in a gambling thread. Check the pinned post of gambling section (Giveaways/promos/etc do not belong in this forum!). You should create a giveaway thread/topic in Games and rounds. Moreover, you should ask user to post their username only instead of Email address. Cause posting email address won't be a good idea. It will remain as public here and user may receive a lot of spam messages for this. You will get a lot of response by creating the promotional topic in Games and rounds.