"Our subscribers are too important to us to ever sell their information to someone else. We never have and never will sell users information like that. Our only source of income is subscriptions and occasional advertisements in the free emails. Ruining our reputation to make a few extra bucks would be an extremely stupid decision on our end. With that said, we do run promotions with partners where we give away awesome vacation packages (Mexico and Tokyo recently). If anyone signs up for one of these promotions they are agreeing to the terms and conditions, which clearly state that by signing up for the giveaway the email address will be distributed to all of the partners involved in the giveaway (typically 4-5 other companies)."
And their response:
"Thanks for the reply! I looked through my emails and found that the emails started right after I entered a giveaway from you. So that explains it! You're right, it does say for the giveaway offer that you're signing up for emails. Sorry that I jumped to conclusions. It's just that I get a lot of spam and it's very annoying. Also, your partner emails provided no value to me at all."
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With that said, it looks like we could do a better job making it even more explicit (which we try to do in the emails announcing the giveaway). We'll work on this on our end and never intended to mislead anyone.