Not sure if everyone knows about the Twitter Lead Gen tool, but it allows you a way to create a card and collect leads with one-click within Twitter. I’m testing it out now and wrote up an article on how to use and will post the results there after a week
I thought I’d share and see if anyone has tried it or had good/bad luck with it or not.
http://ebeab.com/2014/01/20/how-to-build-your-e-mail-list-using-twitter-cards/