What does snapchatdb hope to accomplish by allowing people to download the db.
Just showing and proving that you've hacked the database should be enough to get the company to respond. They're probably not hurting snapchat as much as the potential damage to the people who's phone numbers and usernames are being dowloaded.
Wasn't there a story posted right here on HN like a week ago where some people notified snapchat of the vuln. and provided evidence, but Snapchat told them to basically f* off?
I'm not savvy enough to have the link at hand but I vividly remember that happening.