Kickstarter co-founder Perry Chen has launched a new website that operates under a pretty interesting premise: A single dollar can make a difference. Here’s how Dollar a Day works. Every day, the site features a new nonprofit organization helping people around the world. When you sign up to be a part of the site, each day, they will deduct a single dollar from your account (you can register with a credit or debit card), and give it to the daily selected organization. Even though each individual user is giving just a dollar, collectively, each day, the entire user base will be supporting a new organization. You can go here to learn more, and sign up for their free daily email that tells about each day’s nonprofit …