This is an interesting development, and I look forward to this one rolling out to the rest of us.
The Lead Generation Card makes it easy for users to express interest in what your brand offers. Users can easily and securely share their email address with a business without leaving Twitter or having to fill out a cumbersome form.Twitter's New Lead Generation Card For Brands [advertising.twitter.com]
Today, the Lead Generation Card will only be available to our managed clients; we have plans to launch this Card globally and to small- and medium-sized businesses soon.